TY  - GEN
AU  - WALLIS, W. ALLEN 
AU  - SILLS,DAVID L.
TI  - International Encyclopedia of The Social Sciences
PY  - 1968///
CY  - New Work
PB  -   , Collier-Macmillan Publishers
KW  - Social Science
KW  - Maps
KW  - Population
KW  - London
KW  - Encyclopedia ,1968
N1  - Includes bibliographical references and index
ER  -