The transportation industries, 1889-1946; a study of output, employment, and productivity.

Bibliographical footnotes.

The effect of different systems of lighting on output and accuracy in fine work (typesetting by hand),

Mode of access: Internet.

The shape of road aggregate and its measurement.

At head of title: Dept. of Scientific and Industrial Research and Ministry of Transport.

Uses of input-output and related techniques in partial analysis: the agricultural sector.

"ST/STAT/CONF.10/L.11 & Add. 1."

Balancing the farm output : a statement of the present deplorable conditions of farming, its causes, and suggested remedies /

Mode of access: Internet.

Implementation package : emulsified asphalt-aggregate mixtures-mix design and design coefficients.

"April 1981."

Specifications for bituminous road mix surface dense-graded aggregate type, subclass B-1 : effective June 1, 1937 ...

At head of title: ... U.S. Bureau of Public Roads' class B.

Specifications for bituminous surface dense-graded aggregate type, subclass B-2 (Machine mix) : effective July 15, 1937.

Reproduced from typewritten copy.

Specifications for bituminous surface dense-graded aggregate type, subclass B-3 (Plant mix) : effective May 15, 1939.

Mode of access: Internet.

Specifications for bituminous road-mix surface dense-graded aggregate type, subclass C-1 : effective June 1, 1945.

Reproduced from typewritten copy.

Specifications for bituminous road-mix surface open-graded aggregate type, subclass C-2 (Bituminous retread-asphalt and tar) : effective May 15, 1939 ...

Cover-title.

Specifications for bituminous surface, open-graded aggregate type, subclass C-5 (Machine mix-emulsified asphalt) : effective July 1, 1945.

Reproduced from typewritten copy.

Specifications for bituminous surface dense-graded aggregate type, subclass C-6 (Machine mix) : effective September 1, 1937.

At head of title: ... U.S. Bureau of Public Roads' class C.

Specifications for tar concrete surface course, coarse open-graded aggregate type, subclass H-3, nonproprietary, cold-lay : effective August 1, 1945.

Reproduced from typewritten copy.

Specifications for bituminous concrete binder and surface courses, coarse dense-graded aggregate type, subclass I-1, nonproprietary, hot-mix : effective April 1, 1945.

Reproduced from typewritten copy.