TY  - BOOK
AU  -  Heller,H.Robert
TI  -  International trade : :  theory and empirical evidence / 
SN  -  0134739183
U1  -  382 
PY  - 1973///]
CY  -  Englewood Cliffs, N.J., 
PB  -  Prentice-Hall 
KW  -  International trade
N1  -  Includes bibliographical references
ER  -