1.

図書
図書
1. Standard methods for the examination of water and sewage. 7th ed. / prepared, approved, and published jointly by the American Public Health Association and the American Water Works Association
American Public Health Association ; American Water Works Association
出版情報: New York : American Public Health Association, 1933
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2.

図書
図書
2. Standard methods for the examination of water and sewage. 9th ed
prepared, approved, and published jointly by the American Public Health Association and the American Water Works Association
出版情報: New York : American Public Health Association, 1946
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