00515nam a2200157Ia 450000500170000000800410001703700150005804000070007308200230008010000270010310000250013024500880015526000530024330000370029665000240033320260814110234.0260814t1985    xx            000 0 und d  adonación  afr  aBIB/07.06.00/05053  aEtienne, Gilbert, comp  aGourou, Pierre, comp 0aDes labours de Cluny à la révolution verte : techniques agricoles et population  aParis :bPresses Universitaires de France,c1985  a258 pb. : diagrs., grafs., tbls  aTECNOLOGIA AGRICOLA