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by: Paakkunainen, Timo.

In: Siivoussektori. - ISSN 0357-4229. - 33(2002) : 6, s.42-43, 45
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In: Siivoussektori. - ISSN 0357-4229. - 20(1992) : 5, s.45
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by: Aironen, Kirsi.

In: Puhtaus & Palvelusektori. - ISSN 1459-9198. - Helsinki : Siivoussektori. - 36 (2005) : 2, s. 36-38
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In: Siivoussektori. - ISSN 0357-4229. - 30(1999) : 8, s.38-39
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by: Hirvasnoro, Kai.

In: Kansan uutiset. - ISSN 0357-1521. - 2003-03-14
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by: Virtanen, Leena.

In: Helsingin sanomat. - ISSN 0355-2047. - 2003-03-26
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In: Siivoussektori. - ISSN 0357-4229. - 20(1992) : 5, s.45
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