Rivera Figueroa, César Humberto Components of variance associated with germination, seedling emergence, and early growth in Ponderosa Pine (Pinus ponderosa Dougl. ex Laws.) half sib families César Humberto Rivera Figueroa - xxi, 172 hojas ilustraciones 28 cm. Tesis Subjects--Topical Terms: Nutrición vegetalFitopatología Dewey Class. No.: T / RIV 1998