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This program shows why proper soil and topographic studies are important to complete planning of highways before the highway is built.
National Audiovisual Center, 5285 Port Royal Rd., Springfield, VA 22161, Phone: (703)605-4603, Toll-free: 800-553-6847, Fax: (703)321-8547, Email: orders@ntis.fedworld.gov, URL: http://www.ntis.gov/products/nac/index.asp
                  Available on  VHS
        
                  Running time 20 minutes.
        
              
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