Chambers, T.C.; Farrant, P.A. 1996: Four subspecies of the fern Blechnum penna-marina (Blechnaceae: Pteridophyta). Fern Gazette 15(3): 91–100.
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| Chambers, T.C.; Farrant, P.A. 1996: Four subspecies of the fern Blechnum penna-marina (Blechnaceae: Pteridophyta). Fern Gazette 15(3): 91–100. |