Slavik, B. A field guide in colour to wild flowers ferns & grasses - Chancellor Press London 1973 - 184 - Plant Duspersal Plant Distribution ISBN: 1-85152-129-1 Nat. Bib. No.: 5587 Nat. Bib. Agency Control No.: 581.46SLA Subjects--Topical Terms: Biological SciencesPlant Biology Universal Decimal Class. No.: 581.46