TY  - BOOK
AU  - Keeler,Emmett B.
AU  - Berwick,Donald M.(Donald Mark)
ED  - Research and Development Corporation, 
TI  - Effects of pooled samples
T2  - The Rand paper series
PY  - 1975///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Medical screening.
N1  - Includes bibliographical references
ER  -