00414    a2200157   4500020001500000082001700015100001500032245003100047260003800078300002200116650004100138650001900179650001700198650001700215650002400232  a072731906X  a631.433bHEA  aHead, K. H  aSoil technicians' handbook  aLondonbPentech pressc1989g1989  a[vii],158p.c24cm  aAgriculture and related technologies  aSoil mechanics  aSoil physics  aSoil science  aSpecific techniques