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A geographic history of San Lorenzo Creek Watershed landscape patterns underlying human activities in the lands of the Yrgin, Mission San Jose Rancho, 1796-1834, San Leandro, San Lorenzo, and San Ramon Ranchos, 1830s-1949, towns of Hayward's, Squattersville, and Mt. Eden, 1850s, cities of Hayward, San Lorenzo, and Castro Valley

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