A chart book of indicators of scientific & technical communication in the United States /

"Prepared by Donald W. King, Barbara L. Wood, and Charles G. Schueller.

Acid-fast bacteria and yeasts as indicators of disinfection efficiency /

Mode of access: Internet.

On-board vehicle sensor technology. Volume II--technical report. Final report.

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

A study of efficiency indicators of urban public transportation systems /

Prepared for Dept. of Transportation, Office of University Research, under contract DOT-OS-50228.