Effect of Thinning in Plantations on some of the Physical Factors of the Site and on the Development of Young Northern White Pine (Pinus strobus L.) and Scotch Pine (Pinus silvestris L.).

Burlington, Vermont Agricultural Experiment Station. 1935. 156 S. Gr.-8°. Orig.-Umschlag (Oberrand mit Numerierung, gestempelt). (Bulletin 390). - Innen sehr guter Zustand.
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