Open Library eBook 1976 Educational research L. R. Gay, Lorrie R. Gay, Peter W. Airasian Save Cite View Record
Open Library eBook 1963 Educational research Meredith D. Gall, Joyce P. Gall, Walter R. Borg Save Cite View Record
Open Library eBook 2004 Introduction to educational research Craig A. Mertler, Carol M. Charles Save Cite View Record
Open Library eBook 1962 Understanding educational research Deobold B. Van Dalen Save Cite View Record
Open Library eBook 1998 Understanding and evaluating educational research James H. McMillan Save Cite View Record
