TY  - BOOK
AU  - Bechtel, Robert B.; Marans, Robert W. (Ed)  & Michelson, William (Ed)
TI  - Methods in environmental and behavioral research
SN  - 0-442-21157-0
U1  - 710.7 
PY  - 1987///
CY  - New York
PB  - Van Nostrand-Reinhold Company
ER  -