=LDR 22 4500 =001 4547 =082 04$a001.4 BER =100 1\$aBerg, Bruce L. =245 10$aQualitative research methods for the social sciences =260 \\$aHarlow :$bPearson Education,$c2004 =650 \0$aBooks =852 \\$bFreeman Library$h001.4 BER