Some numbers issued jointly with: NCFRP report, ISSN 1947-5659
Some parts of some numbers issued jointly with: Report (Transit Cooperative Research Program), ISSN 1073-4872
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Chemical abstracts ISSN 0009-2258
Some issues published out of chronological order; some numbers issued in parts.
Some issues accompanied by CD-ROM supplement.
Nos. 1-152 issued by: Highway Research Board of the Division of Engineering and Industrial Research, National Academy of Sciences, National Research Council; 153-<425> by National Research Council, Transportation Research Board; <500-> by Transportation Research Board of the National Academies.