Palmer, E. R. and Gibbs, J. A. (1984) Pulping characteristics of Eucalyptus saligna/grandis growing in Uganda. Tropical Development and Research Institute (TDRI), London, UK. ISBN 0859541894

Palmer, E. R. and Gibbs, J. A. (1978) Pulping characteristics of Dicymbe altsoni from Guyana. Tropical Products Institute (TPI), London, UK. ISBN 0859540898

Palmer, E. R. and Gibbs, J. A. (1977) Pulping characteristics of Pinus caribaea from Fiji: The effect of rate of growth. Tropical Products Institute (TPI), London, UK. ISBN 0859540758

Palmer, E. R. and Gibbs, J. A. (1976) Pulping characteristics of Pinus oocarpa grown on Mountain Pine Ridge, Belize. Tropical Products Institute (TPI), London, UK. ISBN 085954057X

Palmer, E. R. and Gibbs, J. A. (1973) Pulping characteristics of three trees of Pinus caribaea with different densities grown in Jamaica. Tropical Products Institute (TPI), London, UK. ISBN 0859540065