TY  - BOOK
AU  - Liggett,John
AU  - Cochrane,Raymond
TI  - Exercises in social science   / 
U1  - 300.18 LIG 
PY  - 1968///
CY  - London: 
PB  - Constable , 
KW  - Sociological research
N1  -  Includes bibliographical references
ER  -