The cumulative index to the Sonoma Historian (1962 - 2021), the journal of the Sonoma County Historical Society, was maintained by the Sonoma State University Library Special Collections department for the historical society until the end of 2021, when the historical society ceased print publication of the journal.
To access the articles you find, search the Sonoma Historian Online.
| Title | Date | Issue | Pages |
|---|---|---|---|
| Railroad, Northwestern Pacific (NWP) | 1990 | #5 | pp. 8-11 |
| Railroad, Petaluma-Santa Rosa Electric | 1976 | #3 | p. 8 |
| Railroad, Petaluma-Santa Rosa Electric | 1979 | #2 | pp. 7-8 |
| Railroads, narrow gauge | 2006 | #4 | p. 17 |
| Railway depot/visitors center, Petaluma | 2005 | #4 | p. 17 |
| Ranching | 2009 | #3 | pp. 6-8 |
| Rancho Bodega History Society | 2004 | #2 | p. 14 |
| Rancho Cotate | 1995 | #2 | pp. 4-11 |
| Raskin, Jonah | 2021 | #1 | pp. 20-21 |
| Ray, Barbara | 2019 | #1 | p. 8 |
| Red Slide Magnesite Mines and Railroad, book | 2012 | #3 | p. 19 |
| Red-light districts | 2012 | #2 | p. 13 |
| Redwood Empire Timing Association | 2011 | #2 | p15-16 |
| Redwood tree, rare species | 2014 | #2 | p. 19 |
| Redwood tree, rare species | 2014 | #3 | pp. 2, 24 |
| Resorts of Lake County, book | 2008 | #2 | p. 18 |
| Rex Hardware Store, Petaluma | 2006 | #3 | pp. 17-18 |
| Ricksecker, L. E., surveyor | 2011 | #4 | p. 11 |
| Rincon Heights | 1974 | #4 | pp. 6-7 |
| Rincon Valley | 1974 | #3 | back page |
| Rinehart, Katherine J. | 2021 | #1 | p. 16 |
| Ripley, Robert | 2018 | #1 | pp. 4-8 |
| Ripley, Robert | Fall 1967 | pp. 4-12 | |
| Ripley, Robert | 1974 | #5 | p. 7 |
| Ripley, Robert | 2009 | #1 | p. 2 |
| Ripley, Robert | 2009 | #2 | pp. 6-7 |
| Ripley, Robert | 2011 | #4 | p. 20 |
| Ripley, Robert | 2012 | #2 | p. 49 |
| Ripley, Robert | 2012 | #3 | p. 13 |
| Ripley, Robert | 2013 | #2 | pp. 22-23 |
| Riverboats | 2014 | #1 | p. 23 |
| Roads to Petaluma, book | 2016 | #1 | pp. 24-25 |
| Robert H. Cannard, Sonoma’s Last Pioneer, book | 2006 | #3 | p. 18 |
| Rock quarries | 2012 | #2 | p. 29 |
| Rocks and fossils | Summer 1970 | pp. 4-5 | |
| Rohnert Park, book | 2012 | #3 | p. 19 |
| Rose Festival | Spring 1968 | pp. 1-12 | |
| Rose Parade, Santa Rosa | 2015 | #2 | pp. 10-11 |
| Roseland District, Santa Rosa, memories | 1997 | #3 | pp. 4-7 |
| Roseland, history | 2018 | #4 | pp 6-9 |
| Rosenberg Building | 2019 | #2 | p. 25 |
| Rosenberg Department Store | 1990 | #4 | pp. 4-6, 7 |
| Rosenberg Reflections | 1994 | #4 | pp. 10-11, 13 |
| Ross, Sarepta Turner | 1985 | #3 | pp. 6-9 |
| Ross, Sarepta Turner, on west county pioneers | 1990 | #2 | pp. 4-9, 15 |
| Rotary Clubs | 2014 | #1 | p. 12 |
| Round Barn, De Turk | 2009 | #4 | p. 9-10 |
| Round Barn, Fountaingrove, purchase | 2005 | #1 | p. 16 |
| Roxy Theatre | 2002 | #2 | p. 5 |
| Rudee, Helen | 2018 | #4 | p. 24 |