Publication
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Annotations on H. Boschma's work on Hydrocorals (Milleporina, Axoporina, Stylasterina), with additions to his list of the described species of Stylasterina Article
Zoologische Verhandelingen, 181(1), 1-40.January 1981
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Numerical changes and evolution in Actinotrichid Mites (Chelicerata) Article
Zoologische Verhandelingen, 182(1), 1-46.January 1981
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Over enkele orchideeën in Zeeuwsch-Vlaanderen, waaronder Orchis laxiflora Lam. nieuw voor Nederland Article
Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland, 10(9), 168-170.January 1981
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Note on Mollusca from the lower Mentawir Beds, Balikpapan Bay area, Kalimantan (East Borneo) Article
Scripta Geologica, 1-12.January 1981
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The chrysotile of asbestos occurrencesin the Mellid area, NW Spain Article
Leidse Geologische Mededelingen, 52(1), 116-116.January 1981
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Conodont faunas from Portugal and southwestern Spain Part 5. Lower Carboniferous conodonts at Santa Olalla del Cala (Spain) Article
Scripta Geologica, 1-8.January 1981
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Inflorescence morphology of Loranthaceae – an evolutionary synthesis Article
Blumea: Biodiversity, Evolution and Biogeography of Plants, 27(1), 1-73.January 1981
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The Sternoptychidae (Pisces, Stomiatoidei) of the Amsterdam Mid North Atlantic Plankton Expedition 1980, with a note on specimens intermediate between Argyropelecus aculeatus Valenciennes, 1849 and A. olfersi (Cuvier, 1829) Article
Beaufortia, 31(4), 97-106.January 1981