Effectiveness of flashing arrow boards during moving maintenance operations. Final report.

Federal Highway Administration, Washington, D.C.

Crash tests of light-post thrie-beam traffic barriers. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

Crash tests of sharply curved light-post guiderail. Third interim report.

Federal Highway Administration, Office of Research, Washington, D.C.

Performance of a gravel-bed truck-arrestor system.

Federal Highway Administration, Washington, D.C.

Evaluation of Adirondack Park highway signs. Final report.

Federal Highway Administration, Washington, D.C.

Performance of highway safety devices. Final report.

Federal Highway Administration, Washington, D.C.

A study of nitrate respiration in the activated sludge process /

Mode of access: Internet.

The Zoological bulletin of the Division of Zoology of the Pennsylvania Department of Agriculture.

At head of title, v. 1-4: Pennsylvania State Department of Agriculture.

FHWA international scanning report on advanced transportation technology.

Mode of access: Internet.

Evaluation of raised snowplowable pavement markers. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

New York sketches /

The water-front -- The walk up-town -- The cross streets -- Rural New York City.

Annual report of veterans' affairs.

Mode of access: Internet.

Occupational distribution by place of work and place of residence /

Chiefly tables.

National travel surveys. FHWA study tour.

Mode of access: Internet.

Movable concrete median barrier: risk analysis of deflection into opposing traffic.

Federal Highway Administration, Office of Research, Development, and Technology, Washington, D.C.