ROTOR Magazine

Aerospace International from 1971
American Aviation Helicopter Safety Article
American Helicopter Society List of Magazines and Newsletters
Aviation Week with Sikorsky CH-53 on the Cover
Evergreen Skycranes at Work at the Pontiac Silverdome and in Philadelphia
Helicopter Model Ad
Heliswiss Sikorsky S-58 involved in Construction
Jean Ross Howard Article Discussing Hospital Heliports
Jean Ross Howard Article Featuring a Hughes 300 and a Bell JetRanger
Journal of Aerospace Education from November 1974
Sikorsky Press Release regarding Hoists
Sikorsky S-76 Cost Efficiency Calculator
Synchropter Article in Rotor & Wing