The illustrated field guide to ferns and allied plants of the British Isles - Jermy, Clive; Camus, Josephine; Edwards, Peter (London : British Museum (Natural History), 1991)
Keywords: HELECHOS- -- IDENTIFICACION- -- ISLAS BRITANICAS- -- GUIAS; PTERIDOFITOS- -- IDENTIFICACION- -- ISLAS BRITANICAS- -- GUIAS; PLANTAS- -- IDENTIFICACION- -- ISLAS BRITANICAS