Title: Bancroft-Jones Corporation Advertisement
The section on "Specifications for Bancroft Standard Buildings" says that they recommend Robertson Process Asbestos Protected Metal (Corrugated) for the covering of types A and AE buildings.
It says that this material contained asbestos felt.
Designers, Fabricators, and Erectors of Steel Structures
2 Sheets Only, Catalog pages/Advertisement (reverse sides have unrelated info)
Circa 1924, but not dated.
Condition: Good. Carefully removed from a publication.