FOOTNOTES:
[35] P. 51.
[36] Koster, unpublished manuscript, pp. 17-18.
[37] Third Annual Report of the Department of Labor (1920), p. 50.
[38] E. H. Koster, unpublished notes, pp. 42-43.
[39] Lescohier, The Labor Market, p. 264.
[40] From the unpublished notes of an interview by E. H. Koster.