TY  - BOOK
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 
PY  - 1990///
CY  - Karben : 
PB  - F M Druck , 
ER  -