Andrew Irving Andrews / Clyde Lowry Thompson / Henry Fraser Johnstone / Wilbur M. Wilson / William Ray Morgan / Emanuel Amos Hertzell / Horace Wilbur Alexander

OSU:32435068797331

Arch bridges

Andrew Irving Andrews / Emanuel Amos Hertzell

LCCN:a31000386

Enamel and enameling

Henry Fraser Johnstone / Alonzo Plumsted Kratz / Andrew Irving Andrews / Arthur Cutts Willard / Carl Herbert Casberg / Clyde Lowry Thompson / Edward Charles Schmidt / Wilbur M. Wilson / William Ray Morgan / Carl Edward Schubert / Horace Wilbur Alexander

LCCN:a31000520

Arches