1. Baker D and Torrey J G 1979 The isolation and cultivation of actinomycetes root nodule endophytes.In Symbiotic Nitrogen Fixation in the Management of Temperate Forests. Eds. J C Gordon, C T Wheeler and D A Perry. Oregon State University Press, Corvallis, OR pp 38–56.
2. Baker D, Torrey J G and Kidd G H 1979 Isolation by sucrose-density fractionation and cultivationin vitro of actinomycetes from nitrogen-fixing root nodules. Nature London 281, 76–78.
3. Benson D 1982 Isolation ofFrankia strains from alder actinorhizal root nodules. Appl. Environ. Microbiol. 44, 461–465.
4. Berry A and Torrey J G 1979 Isolation and characterizationin vivo andin vitro of an actinomycetous endophyte fromAlnus rubra Bong,In Symbiotic Nitrogen Fixation in the Management of Temperate Forests. Eds. J C Gordon, C T Wheeler and D A Perry. Oregon State University Press, Corvallis, OR pp 69–83.
5. Diem H G, Gauthier D and Dommergues Y R 1982 Isolation ofFrankia from nodules ofCasuarina equisetifolia. Can. J. Microbiol. 28, 526–530.