MIT 6.774, Fall 2004, institutional lecture transcript. The discussion distinguishes largely chemical photoresist ashing in barrel/plasma systems from more strongly directional reactive-ion etching. The source is a teaching lecture, not an experimental paper.

J. Phys. Soc. Jpn. 27, 941–953 (1969), DOI 10.1143/JPSJ.27.941. The publisher abstract describes surface, twin-boundary, elastic and substrate contributions to stability of icosahedral and decahedral particles; full text was not needed for the cited abstract claim.

JEOL News 46(1), 1–5 (2011). Printed p.2, Fig.1 discusses gold decahedra near a fivefold axis and the angular deficit of five fcc tetrahedral domains. This is a primary instrument-user research report, not the source of the exam image.

NSRDS-NBS14, 1967. The first compilation, X-Ray Wavelengths, is by J. A. Bearden; TableV contains the iron and molybdenum characteristic wavelengths. Official digitization: nvlpubs.nist.gov/nistpubs/Legacy/NSRDS/nbsnsrds14.pdf

Official 2009 material table: pdg.lbl.gov/2009/AtomicNuclearProperties/HTML_PAGES/074.html . It gives the reference density $19.3\mathrm{g}\mathrm{c}{\mathrm{m}}^{-3}$. It is an external reference, not the historical NST examination Data Book and not a measured hot-filament density.

The 2014 adjustment gives the historical Planck constant, elementary charge and electron mass used for numerical evaluation. These are external reference values, without a claim about the exam handbook's rounding.

Introductory course notes. Section 2: quantum states and harmonic oscillator and Section 4: quantum mechanics in three dimensions, including hydrogen. This is the introductory work, distinct from the advanced Topics in Quantum Mechanics by David Tong.

Physical Review 109, pages 603–604. The measured junction characteristic supports interband quantum tunnelling and negative resistance.

University electronics course, Chapter 3: ideal high-gain negative feedback and practical operational amplifier limits.

Ask the Applications Engineer—7: Op-amp Noise. Covers resistor Johnson-Nyquist noise, amplifier voltage noise and input-current noise.

MT-002, pages 1–12: sampled spectra, aliasing and practical anti-aliasing filters.

Bell System Technical Journal28(3), pp.435–489, July1949. Original theoretical treatment of rectifying junctions, minority-carrier injection and junction-transistor action.

Publisher laboratory record and opening text: www.nokia.com/bell-labs/publications-and-media/publications/the-theory-of-p-n-junctions-in-semiconductors-and-p-n-junction-transistors/

Primary standards measurements of transport critical current, with specified temperature, magnetic field and electric-field criterion. NBS Special Publication 260-91 (1984). doi.org/10.6028/NBS.SP.260-91

Cambridge Mathematical Tripos Part III, Lent Term 2020, authored lecture 5. Section 5.2, printed pp.3–4, derives the zero-inner-torque steady disc and discusses energy transported by internal torque. The infinite-outer-radius luminosity formula must not be applied unchanged to an arbitrary finite annulus.

Journal of Plasma Physics 82 (2016), article 205820301; DOI 10.1017/S0022377816000489. Author's arXiv version 1604.03835v1 submitted 13 April 2016. Sections 6.1–6.3 discuss simple waves, steepening and non-magnetic shock jumps. The repository records this as peer-reviewed lecture notes; it is not an answer set for a particular NST exam.

Institutional educational reference, last updated 13 May 2021 in the inspected page. Nancy Hall is listed as editor and NASA official; that role is not recast as individual authorship. The page lists normal-shock property ratios and distinguishes conserved total temperature from the loss of total pressure.

Institutional educational reference. The Supersonic and subsonic flow section combines continuity and momentum to obtain the area-velocity relation and explains convergent/divergent acceleration on different Mach branches. No individual author or original publication date is inferred.

Institutional educational reference, last updated 13 May 2021 in the inspected page. Tom Benson is named as editor and NASA official; the institutional issuer is retained as author. Equations 1–10 express isentropic mass flow, and equation 19 identifies its sonic maximum.

Sun Observational Parameters: the apparent diameter at one astronomical unit is 1919 arcseconds. The page credits NASA and is used for an external illustrative angular size, not an assumed exam-handbook value.

Chapter of Interactive Optics by Sander Konijnenberg, Aurèle J.L. Adam and H. Paul Urbach. The whole-work authors apply; no separate chapter byline or publication date is assigned. Locators: Coherence of Light Sources, equations (299)–(302); More on Spatial coherence.