Pearson, Gustaf Adolph. Management of ponderosa pine in the southwest as developed by research and experimental practice - Washington : Departament of Agriculture, 1950 - 218 p. : ilus. - Agriculture monograph ; 6 . - Agriculture monograph ; 6 . LCCN: 38280 Subjects--Topical Terms: Pinus ponderosa. Dewey Class. No.: 634.9751 / P43