TY  - GEN
AU  - Brodisch,
AU  - Louw,
AU  - Thirion,
AU  - Wiechers,
TI  - Upgrading of biological filter sewage purification processes for phosphate and nitrogen removal
PY  - 0000///[s.n.]
CY  - [S.l.]
PB  - 1984
KW  - D 62
KW  - D 75
N2  - Bibliografia
ER  -