TY  - BOOK
AU  - Smith, D.W.,B.G. Sims and D.H. O'Neil
TI  - Testing and evaluation of agricultural machinery and equipment: principles and practices 
SN  - 92-5-100401-3
AV  - FAO S 671  S58 1994
PY  - 1994///
CY  - FAO
PB  - Rome
ER  -