Developing a slow-release nitrogen fertilizer from organic sources: I. Using nonviable bacteria - Choi, J.-M.; Nelson, P. V. (Journal of the American Society for Horticultural Science, 1996)

Developing a slow-release nitrogen fertilizer from organic sources: II. Using poultry feathers - Choi, J.-M.; Nelson, P. V. (Journal of the American Society for Horticultural Science, 1996)

Developing a slow-release nitrogen fertilizer from organic sources: III. Isolation and action of a feather-degrading actinomycete - Choi, J.-M.; Nelson, P. V. (Journal of the American Society for Horticultural Science, 1996)