The introduction of farm machinery in its relation to the productivity of labor in the agriculture of the United States during the nineteenth century

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090	⊔	⊔	‡aHB31.C3 v.9
035	⊔	⊔	‡a(OCoLC)4925445
100	1	⊔	‡aRogin, Leo, ‡d1893-1947.
245	1	4	‡aThe introduction of farm machinery in its relation to the productivity of labor in the agriculture of the United States during the nineteenth century,
260	⊔	⊔	‡aBerkeley, Calif., ‡bUniversity of California press, ‡c1931.
300	⊔	⊔	‡a2 p.l., iii-ix, 260 p. ‡billus. ‡c27 cm.
490	⊔	⊔	‡aUniversity of California publications in economics, v. 9
538	⊔	⊔	‡aMode of access: Internet.
650	⊔	0	‡aFarm mechanization ‡zUnited States.
650	⊔	0	‡aWheat ‡zUnited States.
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