no.1-36 issued by the Research and Development Laboratories )no.1-33 under earlier names: no.1-12,14, Research Laboratory; no.13, 16-33, Research Laboratories(
TOPICAL NAME USED AS SUBJECT
Entry Element
، Portland Cement-- Collected works
LIBRARY OF CONGRESS CLASSIFICATION
Class number
TA
439
.
P83
PERSONAL NAME - PRIMARY RESPONSIBILITY
Relator Code
AU
NO
CORPORATE BODY NAME - SECONDARY RESPONSIBILITY
Entry Element
Portland Cement Association; Chicago. Research and Development Laboratories. Research Dept.