Source: Southwestern Telephone News (St. Louis: Southwestern Bell Telephone Co.), September 1914-December 1916
Location: St.L. / 05 / So89
Last Name:Vallette
First Name:F.
Middle Name:F.
Volume:2
Issue:4
Date of Publication:December 1915
Page:120-121
Remarks:article by, titled "Composite Sets and How They Work"