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| Preview | Issue Date | Title | Author(s) |
|---|---|---|---|
 | Mar-1940 | The National Geographic Magazine : Volume 77 : N3 | Grosvenor, Gilbert H. |
 | Apr-1940 | The National Geographic Magazine : Volume 77 : N4 | Grosvenor, Gilbert H. |
 | Feb-1940 | The National Geographic Magazine : Volume 77 : N2 | Grosvenor, Gilbert H. |
 | Jan-1940 | The National Geographic Magazine : Volume 77 : N1 | Grosvenor, Gilbert H. |
 | May-1940 | The National Geographic Magazine : Volume 77 : N5 | Grosvenor, Gilbert H. |
 | Jun-1940 | The National Geographic Magazine : Volume 77 : N6 | Grosvenor, Gilbert H. |
 | Jul-1940 | The National Geographic Magazine : Volume 78 : N1 | Grosvenor, Gilbert H. |
 | Sep-1940 | The National Geographic Magazine : Volume 78 : N3 | Grosvenor, Gilbert H. |
 | Oct-1940 | The National Geographic Magazine : Volume 78 : N4 | Grosvenor, Gilbert H. |
 | Nov-1940 | The National Geographic Magazine : Volume 78 : N5 | Grosvenor, Gilbert H. |