Research and a Land Management Model for Southern California Watersheds; No. 56Walt Hopkins · First published 2021Open the Tome
Seven Ways to Lighten Your Life Before You Kick the BucketWalt Hopkins, George F. Simons · First published 2016Open the Tome
Research and a land management model for Southern California watershedsWalt Hopkins · First published 1961Open the Tome
Watershed management considerations for sanitation-salvage logging in southern CaliforniaWalt Hopkins · First published 1957Open the Tome
