For fifty years ponderosa pine has experienced a unique spot in American forestry. It has not suffered the sever depredations of its Eastern pine cousins. By the time the westward march of lumbering had reached the vast stands of western yellow pine serious thought, as well as action was being advanced by foresters in public and private service alike.
Borsting, C. O.
"Fifty Years Progress in Managing Ponderosa Pine in the Pacific Northwest,"
Ames Forester: Vol. 37
, Article 8.
Available at: https://lib.dr.iastate.edu/amesforester/vol37/iss1/8