00513 a2200205 4500260001100000100002200011700002000033260001400053245007200067300001100139650000800150650002100158650002400179650001200203300004000215260000900255130000700264440001800271020001800289 aLondon aCHLEQ, Jean-Louis1 aDUPRIEZ, Hugues bMacmillan aVanishing land and water : soil and water conservation in dry lands a117 p. aSol aGestion de l'eau aConservation du sol aErosion bcouv. ill. en coul. , ill. ; 27 cm. c1988 lEn aLand and Life a0-333-44597-X