Human fertility in Puerto Rico / Jerry Walker Combs.
Combs, Jerry Walker, 1913-
Human fertility in Puerto Rico / Jerry Walker Combs. - Ann Arbor, Mich. University Microfilms 1954. - 265 p. ill. - [Doctoral dissertation series. Publication no. : 10, 259] .
Thesis Columbia University.
Bibliography : p. 222-227.
Photostat reproduction.
Fertility--Human.
Puerto Rico--Population.
Human fertility in Puerto Rico / Jerry Walker Combs. - Ann Arbor, Mich. University Microfilms 1954. - 265 p. ill. - [Doctoral dissertation series. Publication no. : 10, 259] .
Thesis Columbia University.
Bibliography : p. 222-227.
Photostat reproduction.
Fertility--Human.
Puerto Rico--Population.