Transkription:
FABRICANT, Solomon
Labor savings i n American industry 1899-1939.
oht. ekr
Varingsl
Amee
8:o New York 1945.
Se: National bureau of economic research.Occasional paper.23.
Polit. ekon
Inog.
New York.
Sr eton
allonal burean
researsh
20.12.43