Cover Image

Why collect retrospective data? /

Bibliographic Details
Main Author:	Butz, William P.
Corporate Author:	Rand Corporation
Format:	Book
Language:	English
Published:	Santa Monica, Calif. : Rand Corp., [1981]
Subjects:	Demographic surveys.

Description
Item Description:	"December 1981." "P-6715."
Physical Description:	12 pages ; 28 cm.