TY  - BOOK
AU  - Clark,Colin, x
AU  - x
TI  - The economic of subsistence agriculture: x
SN  - x
U1  - 631/CLE 
PY  - 1967///
CY  - London
PB  - Macmillan
KW  - Agriculture-Economic Aspects
KW  - Haswell, Margaret
N1  - Includes
ER  -