So you're an issuing officer.

So you're an issuing officer. - [Washington, 1951] - 9 p. illus. 20 cm. - Its Bulletin, no. 149 . - Bulletin (United States. Bureau of Labor Standards) ; 149. .

l 51000150


Child labor--United States.

HD6243.U5 / A52 1951

331.3

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