Alternative sign sequences for work zones on rural highways. Executive summary. Final report.

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

Comparison of signs and markings for passing/no-passing zones. Executive summary.

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

Comparison of signs and markings for passing/no-passing zones. Final report.

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

The suppression of the African slave-trade to the United States of America, 1638-1870.

Bibliography: p. 312-325.

Research memorandum on the family in the depression /

Includes bibliographical references and index.

Research memorandum on crime in the depression /

Social Science Research Council. Bulletin 27. 1937.

Culture conflict and crime,

Mode of access: Internet.

Public schools in their relations to the community : read at a meeting of the association, April 1st, 1880 /

"Reprinted from Penn Monthly for May, 1880."

A case study of failure in attempted metropolitan integration : Nashville and Davidson County, Tennessee /

"A program of research sponsored jointly by National Opinion Research Center and Social Science Division, University of Chicago."

Economic consequences of recent American tax policy,

Mode of access: Internet.

The federal role in unemployment compensation administration /

Mode of access: Internet.

Executive summary and abstract for the report entitled "An evaluation of warning and regulatory signs for curves on rural roads."".

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

Executive summary and abstract for the report entitled "An evaluation of signs for sight-restricted rural intersections."".

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

Sioux City-Woodbury County Alcohol Safety Action Project. 1975 household survey.

National Highway Traffic Safety Administration, Washington, D.C.

An evaluation of warning and regulatory signs for curves on rural roads. Final report.

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