"Slope or flat pruning of pines : an important consideration in Christmas tree plantation management."; "Brown, James H."; "Pine--Pruning.", "Christmas trees."; "Brown, James H."; "1961"; "

Journal article reprint from: Journal of Forestry, v.59:no.3 (1961:Mar.).

"; ""; "P12243"; "pec"; "Christmas trees.", "Pine--Pruning."; "14256"; .