A revised and updated version of
Abraham Kuyper: An Annotated Bibliography 1857-2010 by Tjitze Kuipers (2011)
You can buy a printed edition of this book on the site of the publisher.
1909
Voor den slag.
Utrecht, G.J.A. Ruys [1909]. 16 pp., 25cm.
There is no reference to the Series politieke vlugschriften (see 1909.15) on the cover or title page of this edition. The edition is otherwise the same as 1909.15, except for its use of higher-quality paper, its use of colored paper for the cover, and its omission of the asterism from the back of the front cover.