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Tod lived in and attended primary , secondary schools and the university in St. Paul , Minnesota with his BS in Civil Engineering with distinction in 1926 [ 3 ] , Master of Science in Hydraulic Engineering 1932 [ 4 ] and he later returned to finish his PhD in Civil Engineering on sabbatical from UC Davis in 1948 [ 5 ] after starting work at the University of California in 1940 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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