= Classification of methanogenic bacteria by 16S ribosomal RNA characterization by George E. Fox and others
{c}
{tag=Work by George E. Fox}
Primary source: https://doi.org/10.1073/pnas.74.10.4537
Verified locator: PNAS 74(10), 4537–4541 (October 1977). Primary Abstract https://pmc.ncbi.nlm.nih.gov/articles/PMC431980/ ; publisher indexed page 4537 https://pnas.org/doi/full/10.1073/pnas.74.10.4537 verifies full bylines and S_AB=2N_AB/(N_A+N_B), nucleotide-residue weighting for fragments at least six nucleotides.
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