webportal for Zeppelin mail and airship memorabilia Zeppelin Post Journal – Quarterly publication for Zeppelin mail and airship memorabilia Zeppelin Luftschifftechnik
ISBN 0-517-56904-3. Althoff, William F. USS Los Angeles: The Navy's Venerable Airship and Aviation Technology. Dulles, Virginia: Brassey's, 2004. ISBN 1-57488-620-7