The selection of control groups in case-control studies
Subtitle: evaluation of control groups selected by random digit dialing  and from hospitals
By: Sara H. Olson
Published: 1992
Language: eng
Number of pages: 338
Other titles: Evaluation of control groups selected by random digit dialing and from hospitals.
Notes: Department: Epidemiology.

Thesis (Ph. D.)--Columbia University, 1992.

Includes bibliographical references (leaves 185-197).

Microfilm. Ann Arbor, Mich. : University Microfilms International, 1992. 1 microfilm reel ; 35 mm. 92-32,060