Testing of timepieces /
Gould, Ralph Edgar, 1886-
Testing of timepieces / by R.E. Gould. - ii, 27 pages : tables, diagrams, 6 plates on 3 leaves ; 23 cm. - - U.S. National bureau of standards. Circular of the National bureau of standards C432 . - United States. National Bureau of Standards. Circular ; C432. .
At head of title: U.S. Dept. of commerce. Jesse H. Jones, secretary. National bureau of standards, Lyman J. Briggs, director ... "Supersedes Circular C392."
41051163
001476076 Uk
Clocks and watches--Testing.
C 13.4:432 C 13.4:No.432
Testing of timepieces / by R.E. Gould. - ii, 27 pages : tables, diagrams, 6 plates on 3 leaves ; 23 cm. - - U.S. National bureau of standards. Circular of the National bureau of standards C432 . - United States. National Bureau of Standards. Circular ; C432. .
At head of title: U.S. Dept. of commerce. Jesse H. Jones, secretary. National bureau of standards, Lyman J. Briggs, director ... "Supersedes Circular C392."
41051163
001476076 Uk
Clocks and watches--Testing.
C 13.4:432 C 13.4:No.432