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2951. Barite; [by Donald E. Eilertsen].

2952. Bauxite; [by Robert F. Griffith].

2953. Beryllium; [by Donald E. Eilertsen].

2954. Bismuth; [by Donald E. Moulds].

2955. Boron; [by Timothy C. May].

2956. Bromine; [by Timothy C. May].