The Rockefeller Foundation, Division of Natural Sciences and Agriculture: Delegates during conferences and visiting Tulio Ospina Experiment Station. Medellin, Colombia. June 30 and July 1st, 1955.

United States Agricultural Secretary (Mr. Ezra Taft Benson) visit to Experimental Station at Chapingo in Mexico. 1955

Rodolfo Elias Calles and Norman Borlaug at the CIANO wheat fields in 1955