Schmidt, J. - The genetic behavior of a secondary sexual character. C. R. Carlsberg Lab., XIV, 1920.
Pagina 408
Keck, W. N. - The control of the secondary sex characters in the English sparrow Passer domesticus. J. E., Z. LXVII, 1934.
Pagina 423
Kozelka, A. W.- Integumental grafting as a means of analyzing the factors determining the secondary sexual characters of the Leghorn fowl. J. E. Z
Pagina 423
Accademia della crusca
