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Gerber Variable Scale, Model TP007100B
[The Chimneys]: garden plans.
Baltimore and Ohio Railroad Records
Wright Brothers Natural Gas Engine, Drawings [Photos]
Abbott's Monthly Vol. II No. 1
[Classroom of students : cellulose acetate photonegative]
Richard Lippold papers, 1940s-1977
John Taylor Arms papers, 1910-1952
Architectural and Engineering Drawings
Architectural and Engineering Drawings
4-12, Coxe Estate, Delaware, Susquehanna and Schuylkill Railroad, model Plan." Neg No. 154
Engineering Drawing register (by drawing number)
Engineering Drawing register (by drawing number)
Engineering Drawing register (by drawing number)
Records of Think Surgical, Inc.
School Reports by Crossfield, "Engineering Drawing G.E. 3"