New fuels and vehicles for clean air
An Overview of Low-Emission Combustion Research
Propulsion System Models for Rotorcraft Conceptual Design
Advanced Energetics for Aeronautical Applications
Vehicle Technologies Program: Propane Basics. (Fact Sheet)
Electrolysis Propulsion Provides High-Performance, Inexpensive, Clean Spacecraft Propulsion
Federal Fleets and Clean Cities: A Path Forward
21st Century - Barrels of Alternative Fuels
Clean Cities' Guide to Alternative Fuel and Advanced Medium- and Heavy-Duty Vehicles
Clean Cities Fact Sheet, March 2006
Letter Report on the Review of the Research Program of the FreedomCAR and Fuel Partnership, Phase 3
Alternative fuel information: Alternative fuel vehicle outlook
Total Cost of Ownership A Diesel Versus Gasoline Comparison (2012-2013)
Energy-Smart Transportation Systems