TY  - GEN
AU  - Holtkamp, Rudolf
TI  - Small four - wheel tractors for the tropics and subtropics : their role in agricultural and industrial development
SN  - 3-8236-1161-5
U1  - 631.372 HOL 
CY  - Germany, GTZ
KW  - Farm tractors/ agriculture - power machinery/ crop productions
ER  -