| 一般注記 |
nuc85-67306: Her Sources of nitrogen in the water resource ... 1973 (hdg. on NbU rept.: Sawyer, Clair N.; usage: Clair N. Sawyer)
LC data base, 12/12/85 (hdg.: Sawyer, Clair N.)
Sawyer, Clair N. Chemistry for environmental engineering (Perry L. McCarty)
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