[DONE] Please add the missing authors

[Marius]

Could someone please add the author and editors of the book „ursprung in actu“ and add the page count as well?

For every author I checked whether they already have an author page and linked it if they do.

Author: Klaus Heinrich
Editors: Wolfgang Albrecht, Rüdiger Hentschel

ISBN: 9783862591770
Page count: 304

Thank you in advance!

[Emmy]

Done.

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