Publication
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A revision of Dendrophthora (Loranthaceae) Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 176(1), 1-145.January 1961
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Das frühlingsbild des Diplotaxidetum erugoidis Br.-Bl. 1931 Article
Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht, 178(1), 327-334.January 1961
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Can greenhouse palms of old age be saved by marcotting? Article
Flora Malesiana Bulletin, 16(1), 827-828.January 1961
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Printed and mimeographed issues obtainable from Flora Malesiana Foundation, Rijksherbarium, Leyden Article
Flora Malesiana Bulletin, 16(1), 828-829.January 1961
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Progress in Malaysian botany Article
Flora Malesiana Bulletin, 16(1), 798-801.January 1961
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The East Pacific Rise Article
Flora Malesiana Bulletin, 16(1), 819-820.January 1961
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Dates of publication and bibliographical notes Article
Flora Malesiana Bulletin, 16(1), 821-825.January 1961
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Personal news Article
Flora Malesiana Bulletin, 16(1), 796-797.January 1961