Measure safety injury frequency rates. - [Washington, 1948] - 6 p. 20 cm. - Its Bulletin, no. 102 . - Bulletin (United States. Bureau of Labor Standards) ; 102. . LCCN: l 48000049 Subjects--Topical Terms: Industrial accidents--Statistics. LC Class. No.: HD7262 / .U62 1948b Dewey Class. No.: 331.823