The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of CommerceProject IHR-1
State of Illinois. Department of TransportationU.S. Department of Transportation. Federal Highway Ad...
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads
Issued as part of Progress report no. 2 of the Field investigation of prestressed reinforced concret...
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Bureau of Public Roads. U.S. Department of CommerceThe Division of Highways. State of Illinois
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
The Bureau of Public Roads. U.S. Department of CommerceThe Division of Highways. State of Illinois
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
The Division of Highways. State of Illinois.U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
State of Illinois. Department of TransportationU.S. Department of Transportation. Federal Highway Ad...
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads
Issued as part of Progress report no. 2 of the Field investigation of prestressed reinforced concret...
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Bureau of Public Roads. U.S. Department of CommerceThe Division of Highways. State of Illinois
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
The Bureau of Public Roads. U.S. Department of CommerceThe Division of Highways. State of Illinois
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads....
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
The Division of Highways. State of Illinois.U.S. Department of Commerce. Bureau of Public Roads
The Division of Highways. State of Illinois.The Bureau of Public Roads. U.S. Department of Commerc
State of Illinois. Department of TransportationU.S. Department of Transportation. Federal Highway Ad...
The Division of Highways. State of Illinois.The U.S. Department of Commerce. Bureau of Public Roads
Issued as part of Progress report no. 2 of the Field investigation of prestressed reinforced concret...