TY  - BOOK
AU  - Havens, Ralph Murray
AU  - Cramer, Dale L
AU  - Henderson, John S
TI  - Economics: principles of income, prices and growth 
AV  - HB 171 H3
PY  - 1966///
CY  - New York
PB  - Macmillan
KW  - Economía
ER  -