Revolution in Mexico and Cuba / University of the Air
Resignation letter from Jack London to members of the Socialist Party
Photograph of Ramsay MacDonald, British Prime Minister
Photograph of Margaret G. Bondfield, British Minister of Labour
Photograph of Herbert Hoover, American President
Photograph of Franklin D. Roosevelt, American President
Notebook of George Renny Young
Human rights in the Southern Cone / University of the Air
Correspondence with Jan Tinbergen commenting on the RIO-19 Report
Central America today : life under the volcano / University of the Air