1. Geologic map of the Brothers quadrangle, Jefferson, Mason, and Kitsap Counties, Washington [cartographic material] Yale Public content 1972. 2012-03-20T13:35:01Z. 2012-05-03T15:29:07Z. Geological Survey (U.S.). The Survey. English. Public. Washington (State), Jefferson County, Mason County, and Kitsap County.