TY  - BOOK
AU  - Cook,Thomas D.
AU  - Campbell,Donald Thomas
TI  - Quasi-experimentation: design & analysis issues for field settings 
SN  - 0395307902
U1  - 300 22
PY  - 1979///
CY  - Boston
PB  - Houghton Mifflin
KW  - Social sciences
KW  - Research
KW  - Field work
KW  - Social Sciences
KW  - Research Design
N1  - Includes bibliographical references (p. 387-396) and indexes
ER  -