President, Mr. Dr. Rommel is the initiator of the publication of the original version of Dr. Menzel on behavior testing, its theoretical foundations and its practical implementation. Naturally, some methods of expression and description no longer correspond to today's ideas. Despite this, the text must be transmitted without changes. We ask you to pay attention to this when reading the material. August 17, 1989.

A work rarely found anywhere. Written in the 30s of the twentieth century. But the entire subsequent ideology of testing the working qualities of a German Shepherd is based on this work.