https://sonomacounty.ca.gov/PRMD/Services/Parcel-Report/
RRD Resources and Rural Development
https://library.municode.com/ca/sonoma_county/codes/code_of_ordinances?nodeId=CH26SOCOZORE_ART10RRRERUDE
B Combining Districts
https://library.municode.com/ca/sonoma_county/codes/code_of_ordinances?nodeId=CH26SOCOZORE_ART78BCODI
RC Riparian Corridor Combining Zone.
https://library.municode.com/ca/sonoma_county/codes/code_of_ordinances?nodeId=CH26SOCOZORE_ART65RCRICOCOZO