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Drinking water quality : balancing safety and costs / Parliamentary Office of Science and Technology.

Specification of George Rydill : treating sewage.

Specification of George MacKay : purifying water, sewage, &c.

Specification of John Henry Johnson : destroying noxious exhalations.

Specification of James Alexander Manning : intercepting and treating sewage.

Specification of Thomas Pape : filtering and deodorizing sewage.

Specification of Henry Young Darracott Scott : treating sewage water.

Specification of Alexander Melville Clark : treating sewage.

Specification of Thomas Stevens : treating sewage, &c.

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