GUPTA, M. K.; SINGH, R. P.; JHA, M. N. Soil Chemical Properties of Silver Fir and Spruce Forest Under Different Systems of Silviculture. II-Changes in Soil Phosphorus. Indian Forester, [S. l.], v. 115, n. 11, p. 802–810, 1989. DOI: 10.36808/if/1989/v115i11/9123. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/9123. Acesso em: 10 jul. 2025.