00502nam a2200181 a 450000100080000000500110000800800410001910000280006024500960008826000310018430000110021549000350022665000110026165000090027265300110028165300130029265300150030511739362007-10-11       1978    bl uuuu      00u1 u    #d1 aGONZALEZ, N. L., (Ed.).  aSocial and Technological management in dry landsbpast and present, indigenous and imposed.  aWashington, DC: AAASc1978  a199 p.  a(AAAS Selected Symposium, 10).  aManejo  aSolo  aÁrido  aDry land  aManagement