Louis Henry. Some data on natural fertility . Eugenics quarterly 8[=8(2)]: 81-91

{1961:AA00169583:8:81} Louis Henry. "Some data on natural fertility". Eugenics quarterly 8[=8(2)]: 81-91. NCID=AA00169583; DOI=10.1080/19485565.1961.9987465. Lang=ENG.