By Owen Gingerich.
Publisher: American Institute of Physics.
Published in Physics Today.
Online text: www.infinitoteatrodelcosmo.it/wp-content/uploads/2021/06/catastrofe-marte-brahe-keplero.pdf
Cited passages: Gingerich, Physics Today 64(9), 2011, pp. 51-53: Fig. 2, refraction checks, 13 August log table, Earth-orbit correction and angular errors.