Earl R. Babbie
Practice social research - Belmont, Calif. : Wadsworth Pub. Co., c1986. - 246 tr. 23.5 cm.
Social sciences
300.72 / P895
Practice social research - Belmont, Calif. : Wadsworth Pub. Co., c1986. - 246 tr. 23.5 cm.
Social sciences
300.72 / P895