K. Kaku

Were girl babies sacrificed to a folk superstition in 1966 in Japan?

K. Kaku, 1975, Annals of human biology.

Increased induced abortion rate in 1966, an aspect of a Japanese folk superstition.

K. Kaku, 1975, Annals of human biology.

Influence of a folk superstition on fertility of Japanese in California and Hawaii, 1966.

K. Kaku, Y. S. Matsumoto, 1975, American journal of public health.