1. There are three types of Airships: the nonrigid airship, often called a blimp; the semirigid airship, and the rigid airship, sometimes called a Zeppelin.

2. The K-class blimp was a class of Blimps (non-rigid airship) built by the Goodyear Aircraft Company of Akron, Ohio for the United States Navy

3. The Airship "America" of 1910: The First Attempt to Fly the Atlantic; The Hindenburg Disaster; Airship People; The Goodyear Blimp, Today and Yesterday; Zeppelin NT; Hydrogen and Helium in Rigid Airship Operations; Hydrogen Airship Disasters; The Airship and Futurism: Utopian Visions of the Airship; Deutsche Zeppelin-Reederei (DZR) Zeppelin Mail