00310    a2200109   4500020001500000082001500015100002000030245005600050260004600106300003400152650001400186  a0849336090  a551.48 SIN  aSingh, Vijay P.  aWatershed ModelscVijay P. Singh, Donald K. Frevert  aLondon :bTaylor and Francis Group,c2006  axxiv, 653p. :bill . ;c25 cm  aWatershed