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Start Over Subjects Ventilation ✖Remove constraint Subjects: Ventilation Authors Briggs, Robert, 1822-1882 ✖Remove constraint Authors: Briggs, Robert, 1822-1882 Titles Specification for heating, ventilating, steam apparatus, and motive power: for Girard College buildings ✖Remove constraint Titles: Specification for heating, ventilating, steam apparatus, and motive power: for Girard College buildings

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