Official map of Sonoma County, California : compiled from the official maps in the County Assessor's Office, with additions and corrections to June 1st, 1900 /

Relief shown by hachures.
Includes inset maps of Healdsburg, Santa Rosa, Petaluma and Cloverdale.
"Approved ... by resolution of the Board of Supervisors, September 7th, 1900."
Cadastral maps showing land owners.
Also shows drainage and ranchos.
LC Land ownership maps, no. 44.
Available also through the Library of Congress web site as a raster image.