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SJOEGREN, Erik: Epilithische und epigaeische Moosvegetation in Laub- waeldern der Insel Oeland, Schweden. (With summary: Epilithic and epigeic moss vegetation in deciduous woods on the island of Oeland, Sweden). 1964. (Acta Phytogeogr. Suec.,48). 67 Fig. 17 Tab. 184 S. (9187) 21.00
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