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|a DLC
|c DLC
|d UKM
|d U@S
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| 049 |
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|a U@SA
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| 050 |
0 |
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|a S441
|b .D3 1969
|
| 100 |
1 |
|
|a Danhof, Clarence H.,
|d 1911-
|
| 245 |
1 |
0 |
|a Change in agriculture :
|b the northern United States, 1820-1870 /
|c Clarence H. Danhof.
|
| 260 |
|
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|a Cambridge :
|b Harvard University Press,
|c 1969.
|
| 300 |
|
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|a x, 322 p. :
|b ill. ;
|c 25 cm.
|
| 504 |
|
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|a Incluye referencias bibliográficas (p. 293-316).
|
| 650 |
|
0 |
|a Agriculture
|z United States
|x History.
|
| 650 |
|
0 |
|a Agricultural innovations
|z United States
|x History.
|