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Norris, Daniel H. and James R. Shevock: Contributions toward a bryoflora of California: Part 1: A specimen - based catalogue of mosses; Part II: A key to the mosses. 2004. (Madrono: A west American Journal of Botany, vol. 51, nos. 1-2). illustr. 269 p. gr8vo. Paper bd. (86954) 48.15
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