TY  - BOOK
AU  - Osherson,Samuel
AU  - Warwick,Donald P.
TI  - Comparative research methods
SN  - 013153940X :
U1  - 300.72 
PY  - 1973///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Social sciences
KW  - Research
ER  -