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| 1 | Seminar held at Braunschweig (1990. Brauschweig) Effects of organic contaminants in sewage sludge on soil fertility, plants and animals / edited by J. E. Hall, D. R. Sauerbeck, P. L´Hermite. — Luxembourg : Office for Official Publications of the European Communities, 1992. — 224 p. : tab., gráf. ; 23 cm. — |  |
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