EPIPHYTIC CRYPTOSTIGMATID MITES ON SOME BEECH - AND BIRCH - TREES IN DENMARK.GJELSTRUP P.1979; PEDOGIOLOGIA; ISSN 0031-4056; DDR; DA. 1979; VOL. 19; NO 1; PP. 1-8; ABS. GER; BIBL. 9 REF.; 3 ILL.Article

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