00494nam a2200181 a 450000100080000000500110000800800410001910000200006024500960008026000310017630000110020749000350021865000110025365000090026465300110027365300130028465300150029711739362026-02-24       1978    bl uuuu      00u1 u    #d1 aGONZALEZ, N. L.  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