5
by Allmendinger, Jutta
Bonn : Informationszentrum Sozialwiss., 19XX
Book
8
15
by Robinson, John P.
Ann Arbor, Mich. : Inst. for Social Research, Univ. of Michigan, 1968-
Book
17
by Webb, Eugene J.
Weinheim [u.a.] : Beltz, 1975
Book
20