Relative numbers of sold tractors, self propelled combine harvesters and forage choppers (in relation to maximum sold units/year) (by LAV and manufacturers, former western germany)
Mechanisierungsform;Mähdrescher;Zuckerrübenköpfrodebunker selbstfahrend;Traktor
Auernhammer, H.; Wolf, H.; Demmel, M.
2002