Contzen family.
Surveyors; Fritz Contzen accompanied Emory's Boundary Survey group to Arizona in 1854. His son Philip, also a surveyor, worked for the U.S. General Land Office, and as City Engineer and Pima County Surveyor. Philip's son, Frederick, was a surveyor for the U.S. Geological Survey, Soil Conservation Service and the National Parks Service.
From the description of Contzen family papers, 1878-1954 (bulk 1901-1954). (Arizona Historical Society, Southern Arizona Division). WorldCat record id: 40310467
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