00558nam a2200157Ia 4500001001100000005001700011008004300028020001500071050001400086245004700100260010600147300005800253504003100311650004300342999001500385000001670020251012174547.0  930726s1977    it af    b   i00010 eng c  a9251001650 4aTC930 K8910aIrrigation canal liningcby D. B. Kraatz.   aRomebFood and Agriculture Organization of the United Nations ;aNew Yorkbfor sale by UNIPUBc1977.   axviii, 199 p., [1] fold. leaf of platesbill.c23 cm.  aBibliography: p. 189-199.  0aIrrigation canals and flumesxLinings.  c6200d6200