~ fanning out the threads ~
the shelf
Gas mask books
Every book on OmList tagged gas mask — pulled from the same shelves librarians and readers have been building for years.
5 books on the shelf
§ On the shelf
Presentation of the Goodrich-Lakeside Mask and A Study of the principles involved in mask design
R. G. Pearce
1918
Procedure for Establishing a List of Permissible Gas Masks
United States. Bureau of Mines
1919
