The Verzeichnis der im deutschen Sprachbereich erschienenen Drucke des 16. Jahrhunderts (VD 16) (in English: Bibliography of Books Printed in the German Speaking Countries of the Sixteenth Century), abbreviated VD 16, is a project to make a retrospective German national bibliography for the sixteenth century. The project was compiled during the period 1969–1999. It is financed by the Deutsche Forschungsgemeinschaft (German Research Foundation).
There is a corresponding German national bibliography for the seventeenth century, known as VD 17. Together the VD 16 and VD 17 alongside the planned VD 18 (Verzeichnis der im deutschen Sprachraum erschienenen Drucke des 18. Jahrhunderts) fulfill a function for the bibliographic history of the German cultural zone similar to the English Short Title Catalogue for Britain and North America.
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Media related to VD 16 at Wikimedia Commons
- VD16 official website
- Search page for VD 16 and VD 17
- Digitized VD 16 Imprints at the Universitäts- und Landesbibliothek Sachsen-Anhalt, Halle (Saale)
- VD18-Datenbank: Das Verzeichnis Deutscher Drucke des 18. Jahrhunderts
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Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction