"Site index (Forestry)" . . "Forests and forestry California, Northern." . . . . "California. Department of Forestry and Fire Protection." . . "Trees." . . "Trees California, Northern." . . "Forests and forestry." . . "California, Northern." . . . . . . . "Site index systems for major young-growth forest and woodland species in Northern California"@en . . . . . . . . . "Site index (Forestry) California, Northern." . .