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

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93. Gem stones; by Benjamin Petkof.

94. Gold; by J. Patrick Ryan.

95. Graphite; by Donald E. Eilertsen.

96. Gypsum; by Paul L. Allsman.

97. Helium; by Edwin M. Thomasson.

98. Iodine; by William C. Miller.