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Site selection for black spruce (Picea mariana (Mill.) B.S.P.) seedlings seed orchards and management techniques for seed orchards in New Brunswick: Abstract, M.F. thesis, University of New Brunswick. 1982. Simpson, J.D. Page 210 (Vol. Part 1) in C.W. Yeatman, editor. Proceedings of the 18th meeting Canadian Tree Improvement Association, part I, August 17-20, 1981, Duncan, British Columbia. Environment Canada, Canadian Forestry Service, Ottawa.