An analysis of crown condition of Picea, Fagus and Abies in relation to environment in Switzerland
Webster R, Rigling A & Walthert L
Webster, R., Rigling, A., & Walthert, L. (1996). An analysis of crown condition of Picea, Fagus and Abies in relation to environment in Switzerland. Forestry, 69(4), 347-355. https://doi.org/10.1093/forestry/69.4.347