A guide to seasonal adjustment of labor force data.

Mode of access: Internet.

Effectiveness of soil and water conservation practices for pollution control /

Mode of access: Internet.

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 handbook on the selection and use of family life films with discussion groups.

Mode of access: Internet.

Irrigation by refractometer

Mode of access: Internet.

A study of nitrate respiration in the activated sludge process /

Mode of access: Internet.

Evaluation of raised snowplowable pavement markers. Final report.

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

First annual report of the Massachusetts State Department of Agriculture. Report of commissioner and other officers. 1918.

Continued by the Annual report of the Department of Agriculture.

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.

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

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

Performance of two ice-retardant overlays. Final report.

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

Crash tests of construction zone traffic barriers. Second interim report.

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