00423nam a2200145 a 450000500170000000800410001704100080005808200120006610000260007824500600010425000120016426400520017630000320022865000170026020260717091044.0260717s1975    ii            000 0 eng d  aeng04a631.5851 aDouglas, James Sholto10aHydroponics: the Bengal system /cDouglas, James Sholto  a5th ed. 1aBombay :bOxford University Press,c1975, 1977.  axvi, 185 p. : ill. ; 19 cm. 4aHydroponics.