1.
図書 |
edited by Grattan Freyer ; foreword by Michael Garvey
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2.
図書 |
by Henry J. Todd
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3.
雑誌 |
Geological Society of America
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4.
雑誌 |
Agricultural Experiment Station, University of Minnesota
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5.
雑誌 |
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6.
雑誌 |
United States. Dept. of Agriculture
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7.
雑誌 |
岐阜縣農會 [編]
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8.
雑誌 |
University of Minnesota. Agricultural Experiment Station
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9.
雑誌 |
State of Vermont
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10.
雑誌 |
Virginia Agricultural Experiment Station
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