Trends in birth rates in the United States since 1870
By: by Bernard Okun.
Series: Johns Hopkins University studies in historical and political science -- ser. 76, no. 2
Publisher: Johns Hopkins Press
Published: 1976
Place of publication: Baltimore
Language: eng
Number of pages: 203
Subjects: United States -- Population
Notes: Originally presented as the author's thesis, Johns Hopkins University.

Includes bibliographical references and index.

Photocopy. Ann Arbor, Mich. : Xerox University Microfilms, 1976.