Survey Research Methods.
Babbie, Earl.
Survey Research Methods. - 2nd ed. - Belmont,California. Wadsworth Publishing Company. 1990. - xx-395p.: 24cm.
0534126723
Social Sciences.
300.723 BAB
Survey Research Methods. - 2nd ed. - Belmont,California. Wadsworth Publishing Company. 1990. - xx-395p.: 24cm.
0534126723
Social Sciences.
300.723 BAB