1. Statistical Methods in Biology;Bailey,1959
2. Techniques for injecting chemicals into trees;Dick;Arboric. J.,1985
3. Vegetative propagation methods for Triplochiton scleroxylon K. Schum;Howland,1975
4. Current management techniques for raising Triplochiton scleroxylon K. Schum. from stem cuttings;Howland,1975
5. Triplochiton scleroxylon K. Schum. and Other West African Tropical Hardwoods;Howland,1977