Research methods in education /
Cohen, Louis,
Research methods in education / by Louis Cohen and Lawrence Manion. - London : Croom Helm, 1985. - 328 p. : ill. ; 23 cm.
0709934286
Education--Research.
LB1028.C64 1985
Research methods in education / by Louis Cohen and Lawrence Manion. - London : Croom Helm, 1985. - 328 p. : ill. ; 23 cm.
0709934286
Education--Research.
LB1028.C64 1985