The Hay rifle periscope
By: John G. Hay ; The Northern Electric Co., Limited
Contributors: Northern Electric Co
Series: CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 81312; CIHM/ICMH microfiche series -- no. 81312
Publisher: s.n.
Published: 1915
Place of publication: Montréal?
Language: eng
Format: [microform] /
Number of pages: 11
Subjects: World War, 1914-1918; Equipment and supplies; Rifles; Carabines; Matériel; Guerre, 1914-1918 (Mondiale, 1re)
Notes: Filmed from a copy of the original publication held by the National Library of Canada. Ottawa : Canadian Institute for Historical Microreproductions, 1996.

11 p. : ill. ; 23 cm.