共 3 条
[1]
HARRISON RG, 1963, TEXTBOOK HUMAN EMBRY, P157
[2]
PATTEN BM, 1958, FOUNDATIONS EMBRYOLO, P449
[3]
Stephens F D, 1966, Aust N Z J Obstet Gynaecol, V6, P64, DOI 10.1111/j.1479-828X.1966.tb00350.x