Quasi-experimentation :
Cook, Thomas D 1881-1965.
Quasi-experimentation : design & analysis issues for field settings / Thomas D Cook and Donald Thomas Campbell. - Boston : Houghton Mifflin, ©1979. - 405p. ; 23 cm.
0395307902 9780395307908
Social sciences -- Research.
Paleontology.
Geology--Great Britain.
QE26 / .B15
519.54 / COQ 1979
Quasi-experimentation : design & analysis issues for field settings / Thomas D Cook and Donald Thomas Campbell. - Boston : Houghton Mifflin, ©1979. - 405p. ; 23 cm.
0395307902 9780395307908
Social sciences -- Research.
Paleontology.
Geology--Great Britain.
QE26 / .B15
519.54 / COQ 1979