La roue phonique
By: par M. Paul La Cour.
Contributors: Burndy Library,
Publisher: K. Schønberg, libraire ... : Imprimerie de Nielsen & Lydiche; R. Nilsson, libraire ...
Published: 1878
Place of publication: Copenhague; Paris
Language: fre
Number of pages: 72
Subjects: Phonic wheel.; Telegraph.
Notes: Title vignette (phonic wheel).