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Start Over You searched for: Publish Year Decade 1960 - 1969 Remove constraint Publish Year Decade: 1960 - 1969 Sudoc Stem I 28.37/a Remove constraint Sudoc Stem: I 28.37/a

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131. Manganese; by Gilbert L. DeHuff.

132. Mercury; by George T. Engel.

133. Mica; by Benjamin Petkof.

136. Molybdenum; by John L. Morning.

138. Nickel; by Harold W. Lynde, jr.

139. Nitrogen; by Richard W. Lewis.

140. Peat; by Eugene T. Sheridan.