1 image. President of Vietnam, 18 May 1957. Ngo Dinh Dien (President of Vietnam); Robert Minckler (President of General Petroleum Corporation).; Supplementary material reads: " Chernus -- Harbor. Captions. President of Viet-Nam [sic]. One neg shows L.R. Ngo Dinh Dien, President of Viet-Nam, looking at photograph of General Petroleum plant, pointed out by Robert Minkler, president of General Petroleum. Dinh Dien visited the refinery in Torrance. Two negs show President Ngo Dihn Dien placing protective tin helmet on head. Alongside him is Robert Minker [sic], president of General Petroleum Corp. One neg shows President Ngo Dinh Dien looking over exhibit at General Petroleum refinery. On his left is an aide -- (unable to get identification). Two negs show President Ngo Dinh Dien at 'cracking unit.' With him is Minkler".