TY  - BOOK
AU  - Sampson,Roy J.
AU  - Calmus,Thomas W.
TI  - Economics: concepts, applications, analysis 
SN  - 0395178126
PY  - 1974///
CY  - Boston
PB  - Houghton Mifflin
KW  - Economics
N1  - Bibliography : p.399-411
ER  -