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[11]
MILLER HM, 1970, J ASSOC OFF ANA CHEM, V53, P1100
[15]
RODER E, 1973, Z ANAL CHEM, V266, P358
[16]
SHARMA RM, 1975, THESIS U ILLINOIS
[17]
1970, US PHARMACOPEIA, P760
[18]
1974, FED REG 13957 2, V40