TY  - BOOK
AU  - Gwyer, G.D.
TI  - Perennial crop supply response: the case of Tanzanian sisal 
U1  - 339.1739678 
PY  - 1971///
CY  - Ashford, Kent.
PB  - Wye College Press
KW  - Sisal industry
KW  - Tanzania
N1  - Includes bibliographical references
ER  -