00519    a2200157   4500082001700000100002300017245008800040250001100128260005100139300002000190650004100210650002100251650003400272650003100306650002400337  a631.585bDOU  aDouglas, J. Sholto  aHydroponicsbthe bengal system with notes on other methods  of soilless cultivation  a5th ed  aNew DelhibOxford University Pressc1951g1975  axvi,185p.c19cm  aAgriculture and related technologies  aSoilless culture  aSpecial method of cultivation  aCultivation and harvesting  aSpecific techniques