=LDR 00000nam 2200000 4500 =001 INLIS00000000004114 =005 20260815102228 =082 ##$$a 001.4 =100 1#$$a Donlad T Campbell =245 1 $$a Experimental and Quasi Experimental Designs for Research /$c Donlad T Campbell =260 ##$$a Chicago :$b Rand Minally & Company,$c 1996 =650 ##$$a Riset