Chapman, Oscar L. (Oscar Littleton), 1896-1978

Secretary of the Interior Oscar Chapman (center, right) speaks with Antonio J. Bermudez, Director of Petroleos Mexicanos (PEMEX) (center, left), on a plane to the Salamanca Refinery in Guanajuato, Mexico. Also pictured: Bruce K. Brown, Deputy Administrator of the Petroleum Administration for Defense (back to camera, right). All others unidentified.

Secretary of the Interior Oscar Chapman (left) and Antonio J. Bermudez, Director of Petroleos Mexicanos (PEMEX) tour the Salamanca Refinery in Guanajuato, Mexico. All others unidentified.

Secretary of the Interior Oscar Chapman (left) crowns Maldi Tarris as Cherry Blossom Festival Queen.

Administrative Assistant Secretary Vernon Northrop (left) and Secretary of the Interior Oscar Chapman (right) present to Distinguished Service Award to Mrs. J. Atwood Maulding upon her retirement.

Secretary of the Interior Oscar Chapman (center, left) speaks with the United States Ambassador to Mexico William O'Dwyer (center, right) after arriving at the Central Airport in Mexico City. Secretary Chapman is in town to tour several Mexican oil refineries. All others unidentified.

Secretary of the Interior Oscar Chapman greets an unidentified girl while visiting a school for children of oil workers at the Salamanca Refinery in Guanajuato, Mexico. All others unidentified.

A crowd on a platform watches the National School Safety Patrol Parade on Constitution Avenue in Washington, D.C. Pictured: Secretary of the Interior Oscar Chapman (first row, fifth from right) and son, James Chapman (first row, third from right). All others unidentified.

Secretary of the Interior Oscar Chapman (left) visits a school for children of oil plant workers at the Salamanca Refinery in Guanajuato, Mexico. All others unidentified.

Secretary of the Interior Oscar Chapman (center, right) talks with Antonio J. Bermudez (center, left), Director of Petroleos Mexicanos (PEMEX), while touring the Salamanca Refinery in Guanajuato, Mexico. All others unidentified.

Secretary of the Interior Oscar Chapman (right) speaks with Antonio J. Bermudez, Director, Petroleos Mexicanos (PEMEX), on an airplane to the Salamanca Refinery in Guanajuato, Mexico.