Proceedings of a Joint Work Conference on Provenance and Genetic Improvement Strategies in Tropical Forest Trees held in Mutare, Zimbabwe, 9-14 April, 1984 by IUFRO working parties S2.02-08 Tropical species provenances, S2.03-01 Breeding tropical species, S2.03-13 Breeding southern pines - Barnes, R. D.; Gibson, G. L. (Dept. of Forestry, Commonwealth Forestry Institute, University of Oxford ; Zimbabwe Forestry Commission, 1984)