00825nam0-22003131i-450-99000396772040332120081209132837.0000396772FED01000396772(Aleph)000396772FED0100039677220031002d1948----km-y0itay50------baengUSa-------001yyWater purification controlE.S. Hopkins3rd ed.BaltimoreWilliams & Wilkins1948289 p.20 cmAcque potabili546.2220itaHopkins,Edward Scott149395ITUNINARICAUNIMARCBK99000396772040332115 M/2-50DINIDDINIDWater purification control512444UNINA