1. 1
    ...National Library of Canada, Canadian Theses Service,...
    Thesis Microfilm Book
  2. 2
    by Price, Manning A.
    Published 1997
    ...Dept. of Agriculture, Agricultural Research Service,...
    Government Document Microfilm Book
  3. 3
    by Loewenthal, Stuart H.
    Published 1981
    ...Dept. of Commerce, National Technical Information Service,...
    Microfilm Book
  4. 4
    Published 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