1. Symbiotic nitrogen fixers available for use in temperate forestry;Akkermans,1979
2. Nonleguminous root nodule symbioses with actinomycetes and rhizobium;Akkermans,1981
3. Presence and dispersal of infective Frankia in peat and meadow soils in Sweden;Arveby;Biol. Fertil. Soils,1988
4. “Hortus Third. A Concise Dictionary of Plants Cultivated in the United States and Canada,”;Bailey,1976
5. “Probability Tables for Containerized Seedlings.”;Balmer,1976