00660cam a2200217 4500 377782766 TxAuBib 20170331120000.0 180707s2018||||||||||||||||||||||||eng|u 57460 Project Gutenberg PGUSA eng TxAuBib Morgan, Thomas Hunt. The genetic and the operative evidence relating to secondary sexual characters [Gutenberg] / Thomas Hunt Morgan. Project Gutenberg, 2018. Public domain in the USA. Text. Genetics. Sex (Biology.) Poultry. http://www.gutenberg.org/ebooks/57460 TXTLL