Kaku, Kanae (April 1975). "Increased induced abortion rate in 1966, an aspect of a Japanese folk superstition". Annals of Human Biology. 2 (2): 111–115. doi:10.1080/03014467500000651. PMID1052742.
Kaku, Kanae (April 1975). "Increased induced abortion rate in 1966, an aspect of a Japanese folk superstition". Annals of Human Biology. 2 (2): 111–115. doi:10.1080/03014467500000651. PMID1052742.