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Periodical

City reduces sewage treatment costs by 50 percent

Authors : Childers, Terry L.; Ridings, Richard L.

Source: Public Works. May, 1988, Vol. 119, Issue 6, p69, 2 p.

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Periodical

Cheaper than dirt

Authors : Ridings, Richard L.

Source: Public Works. Feb, 1981, Vol. 112, p66, 2 p.

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Periodical

'User fee' pays for clean streets

Authors : Ridings, Richard L.

Source: American City & County. Feb, 1981, Vol. 97, p43, 2 p.

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Periodical

Value engineering works for Oklahoma City

Authors : Childers, Terry L.; Ridings, Richard L.

Source: Public Works. Jan, 1989, Vol. 120, Issue 1, p70, 1 p.

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