24th annual report of the commissioner of labor 1909 

 - Washington  Govt. press        1911 
 - "xv, 1493p"  cm. 
<br/><br/><label>Standard No.: </label>187498 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>"X:9583:(Z2,23).5.N09r, E1"