Highway pavements and structures maintenance and security.

Highway maintenance safety, support and services.

Transportation security and infrastructure protection.

Public transportation security. by Rowshan, Shahed

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Web security for network and system administrators by Mackey, David

Guide to network defense and countermeasures by Holden, Greg

Residential construction academy electrical principles by Herman, Stephen L.

Network security a beginner's guide by Maiwald, Eric

RP assures US of tight security at int'l ports by Ilustre, Jennie L.

Airports ports, terminals under tight guard