TY  - BOOK
TI  - Basic problems, concepts, and techniques
SN  - 0471218294
AV  - TS155 .D64 1968
U1  - 658.5 
PY  - 1968///]
CY  - New York
PB  - Wiley
KW  - Case studies
N1  - Bibliographical footnotes
ER  -