Journal of the Association of Official Analytical Chemists.

v.49 no.1-3; v.49 no.4-6; v.50 no.1-3; v.50 no.4-6; v.51 no.1-3; v.51 no.4-6; v.52 no.1-3; v.52 no.4-6; v.53 no.1-3; v.53 no.4-6; v.54 no.1-3; v.54 no.4-6; v.55 no.1-3; v.55 no.4-6; v.56 no.1-3 1973; v.56 no.4-6 1973; v.57 pt.1; v.57 no.1-3; v.57 pt.2; v.57 no.4-6; v.58 pt.1; v.58 no.1-3; v.58 pt.2; v.58 no.4-6; v.59 pt.1; v.59 no.1-3; v.59 pt.2; v.59 no.4-6; v.60 pt.1; v.60 no.1-3; v.60 pt.2; v.60 no.4-6; v.61 pt.1; v.61 no.1-3; v.61 pt.2; v.61 no.4-6; v.62 pt.1; v.62 no.1-3; v.62 pt.2; v.62 no.4-6; v.63 pt.1; v.63 no.1-3; v.63 pt.2; v.63 no.4-6; v.64 no.1-3; v.64 no.4-6; v.65 no.1-3; v.65 no.4-6; v.66 no.1-3; v.66 no.4-6; v.67 no.1-3; v.67 no.4-6; v.68 no.1-3; v.68 no.4-6; v.69 no.1-3; v.69 no.4-6; v.70 no.1-3; v.70 no.4-6; v.71 no.1-3; v.71 no.4-6; v.72 no.1-3; v.72 no.4-6; v.73 no.1-3; v.73 no.4-6; v.74 no.1-3; v.74 no.4-6