00481nam a2200133Ia 4500008004100000082002300041100003600064245003400100260004800134300000900182490003400191600008600225650003600311130903s9999    xx            000 0 und d  a620.91:63(063)  L4  aEdited  D.E.McCloud and others.  aA new look at energy sources.  aMadisonbAmerican Society of Agronomyc1974  a49p.  aASA Special Publication no.22  aAnnual Meeting of the American Society of Agronomy in Las Vegas, Nevada, Nov.1973  aAgricultural Engineering,Energy