He wrote over 60 books pertaining to his system, as well as a periodical. His main work, which is available in several languages, is titled The Combination of Stellar Influences, and was first published in 1940.
Further reading
James Holden, A History of Horoscopic Astrology, American Federation of Astrologers, Tempe, AZ, 1996. ISBN 0-86690-463-8
Reinhold Ebertin, The Combination of Stellar Influences, American Federation of Astrologers, Tempe, AZ, 2000. ISBN 0-86690-087-X