Breag, G. R. An introduction to small-scale natural draught wood-fired furnace systems / G.R. Breag, A.P. Harker and A.E. Smith. - London : Tropical Development and Research Institute, 1986. - Tropical Development and Research Institute reports ; G194 . Includes bibliographical references. ISBN: 0859542025 Subjects--Topical Terms: Fuelwood.Furnaces.