00838cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040004000111042001200151050002200163051001500185100005000200245003900250260002300289300002400312410004500336505017400381650002400555999001700579gs 60000184 DLC20260227111409.0821007s1960    dcu          f000 0 eng c  ags 60000184   a(OCoLC)8839658  aU.S. Geol. Survey. Libr.cMsSMdDLC  apremarc00aQE75b.C5 no. 414  aTD355b.L41 aLeopold, Luna B.q(Luna Bergere),d1915-2006.10aConservation and water management.  aWashington,c1960.  a4 v. (26 p.)c27cm.20aGeological Survey (U.S.).tCircularv4140 aContents.-pt. A. Conservation and protection.-pt.B The challenge of water management.-pt. C. The conservation attitude.-pt. D. Ecological systems and the water resource. 0aWater conservation.  c29439d29439