HIMIUJIJHWlI‘lllHillWII‘HinHIHll/IllUHHWIIIJ/Hlll/lll , "
I 1 Y3 IEMPLOYMENT AND RELATED STATISTICS
g as I” 39/2901? MINES AND QUARRIES. 1935 , _ '
' l mm ' 7 ,
' 4 “WORKS PROGRESS ADMINISTRATION f
.: : NATIONAL RESEARCH PROJECT« ' ,
-‘ - - AND _
".g: 2.] _ - DEPARTMENT OF THE INTERIOR - '
, BUREAU OF MINES . .5 1‘
' ’ DEPARTM ENT'OF COMMERCE 5'7 ,
' = 1 BUREAU OF THE CENSUS . p .1 __A :