00827nam0-22003011i-450-99000033383040332120001010000033383FED01000033383(Aleph)000033383FED0100003338320001010d--------km-y0itay50------baitay-------001yyDiatomaceous earthBy Robert Calvert.New YorkChemical Catalog Company1930251 p., ill., 24 cmAmerican chemical society monograph seriesNo. 52668Calvert,Robert18794ITUNINARICAUNIMARCBK99000033383040332104 186-65CHIM. FARM.DINCHDINCHDiatomaceous earth123876UNINAING01