TY  - BOOK
AU  - Blalock,H.M.
TI  - Causal models in the social sciences
SN  - 0202303144
AV  - SJMC H61.25.C38 
PY  - 1985///
CY  - New York
PB  - Aldine de Gruyter
KW  - Social sciences
N1  - Include bibliographical references and index
ER  -