| LC control no. | n 85247014 |
|---|---|
| Personal name heading | Hazen, Allen, 1869-1930 |
| Found in | His The filtration of public water-supplies, 1895: t.p. (Allen Hazen) OCLC data base, 6/9/87 (hdg.: Hazen, Allen, 1869-1930) |
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