Longer combination trucks: potential infrastructure impacts, productivity benefits, and safety concerns.

Mode of access: Internet.

The coal future : economic and technological analysis of initiatives and innovations to secure fuel supply independence /

Includes bibliographies.

The SRI hierarchical development methodology (HDM) and its application to the development of secure software /

Item 247.

Essential air service : changes in subsidy levels, air carrier costs, and passenger traffic : report to the Chairman, Subcommittee on Aviation, Committee on Transportation and Infrastructure, House of Representatives /

"B-284056"--P. 3.

Public information in the national information infrastructure : report to the Regulatory Information Service Center, General Services Administration, and to the administrator of the Office of Information and Regulatory Affairs, Office of Management and Budget /

Mode of access: Internet.