National
National geographic / [editor-in-chief Melville Bell Grosvenor ; editor Gilbert M. Grosvenor, Wilbur E. Garett, / [editor-in-chief William L. Allen]. -- 1973, vol. 143, no. 1-6. -- vol. 143, no. 1-6 (1973). -- Washington : National Geographic Society,. -- ISSN : 0027-9358.
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