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1
Minerals Yearbook, 1936. Compiled under the supervision of O.E. Kiessling and H.H. Hughes, Mineral Resources and Economics Division.
Published 1937Subjects: Online Access
Government Document Electronic eBook -
2
Minerals Yearbook, 1937. Compiled under the supervision of H.H. Hughes, Economics and Statistics Branch.
Published 1937Subjects: Online Access
Government Document Electronic eBook