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1“...National Library of Canada, Canadian Theses Service,...”
Thesis Microfilm Book -
2by Price, Manning A.“...Dept. of Agriculture, Agricultural Research Service,...”
Published 1997
Government Document Microfilm Book -
3by Loewenthal, Stuart H.“...Dept. of Commerce, National Technical Information Service,...”
Published 1981
Microfilm Book -
4Published 1995“...Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center ; Available to the public through the National Technical Information Service,...”
Government Document Conference Proceeding Microfilm Book