The addresses of all authors. Abstracts must be accompanied by up to six key words in English and German. Between them these should characterize the paper and will be used for indexing and data retrieval purposes. Line drawings must be suitable for direct reproduction. Photographs intended for halftone reproduction must be good glossy prints, of maximum contrast.
Graph paper is unsuitable for reproduction.
Whenever possible the same scale should be chosen for all the figures of a given article to facilitate reproduction en bloc. The printed figures should not exceed the column width of 8.5cm. Lines must be black and sharp-edged. The finished drawings should bear the number of the figure and the name of the author. If comments or explanations to the text must be given separately, please insert a number in the text and add the footnotes with corresponding numbers at the bottom of the page.