A theoretical comparison of fixed route bus and flexible route subscription bus feeder service in low density areas. Final report.

Transportation Department, Office of Research and Development Policy, Washington, D.C.

Scale model study of low-density concrete impact attenuators. Final report.

Ohio Department of Transportation, Columbus

Tests of low-density marine limestone for use in breakwaters /

"May 1976."

Low-density research in the hypersonic shock tunnel

"The experimental study reported here has been performed under the sponsorship of the Fluid Dynamics Branch, Aeronautical Research laboratories of the U.S. Air Force Air Research and Development Command, Contract no. AF 33(616)-6025."