Wall, W.D. Williams, H.L
Longitudinal studies and the social sciences - London, Heinemann 1970
0 435 82847 9
Social sciences - longitudinal - surveys/ social sciences - collection of date
300.72 WAL
100
Longitudinal studies and the social sciences - London, Heinemann 1970
0 435 82847 9
Social sciences - longitudinal - surveys/ social sciences - collection of date
300.72 WAL
100