| NATIONAL GEOGRAPHIC Aug 1968 Mexico City - Basques |
| NATIONAL GEOGRAPHIC NOVEMBER 1968 AUSTRALIA SWITZERLAND |
| National Geographic- May 1968- North Cascades- Nevada |
| NATIONAL GEOGRAPHIC JULY 1968 THE CANADIAN NORTH |
| NATIONAL GEOGRAPHIC OCTOBER 1968 |
| National Geographic - Single Issue - February 1968 |
| National Geographic Magazine July 1968 |
| NATIONAL GEOGRAPHIC APRIL 1968 VIETNAM |
| National Geographic Magazine March 1968 |
| National Geographic Magazine April 1968 Viet Nam |
| National Geographic - Single Issue - July 1968 |
| National Geographic Magazine May 1968 |
| National Geographic- Dec. 1968- Mekong- Williamsburg |
| NATIONAL GEOGRAPHIC MAGAZINE Aug 1968 Mexico City |
| NATIONAL GEOGRAPHIC MAY 1968 FINLAND |
| National Geographic Magazine June 1968 with map |
| National Geographic Magazine February 1968 with map |
| NATIONAL GEOGRAPHIC AUGUST 1968 MEXICO CITY |
| National Geographic Hard bound 1968 complete |
| NATIONAL GEOGRAPHIC OCT 1968 MEXICO, GREECE, ANTARCTICA |
| NATIONAL GEOGRAPHIC Apr 1968 Montagnards - Netherlands |
| National Geographic - April 1968 |
| National Geographic Magazine 1968 FULL YEAR -12 ISS. |
| National Geographic - Single Issue - September 1968 |
| National Geographic Feb 1968 - United States Map |
| NATIONAL GEOGRAPHIC MARCH 1968 CORONATIONS |
| National Geographic - Single Issue - June 1968 |
| National Geographic Magazine September 1968 |
| NATIONAL GEOGRAPHIC MAGAZINE July 1968 Forest Fires |
| NATIONAL GEOGRAPHIC JUNE 1968 VIENNA |
| NATIONAL GEOGRAPHIC May 1968 Finland - Nevada - Paris |
| National Geographic Magazine Nov 1968 Queensland |
| LOT OF 12 NATIONAL GEOGRAPHIC JAN - DEC 1968 FULL YEAR! |
| National Geographic Magazine August 1968 |
| National Geographic May 1968 |
| NATIONAL GEOGRAPHIC SEPT 1968 AFGHANISTAN, RI, BRAZIL |
| National Geographic Magazine January 1968 |
| NATIONAL GEOGRAPHIC JANUARY 1968 ALEXANDER THE GREAT |
| NATIONAL GEOGRAPHIC MAGAZINE - MAY 1968 ISSUE |
| NATIONAL GEOGRAPHIC MAGAZINE - JANUARY 1968 ISSUE |
| WILLIAMSBURG VA National Geographic December 1968 |