@article{1183407222, author = {Jacoby, Harold}, title = {The Photochronograph}, journal = {Bull. New York Math. Soc.}, volume = {1}, number = {2}, year = {1891}, pages = { 44-46}, language = {en}, url = {http://dml.mathdoc.fr/item/1183407222} }
Jacoby, Harold. The Photochronograph. Bull. New York Math. Soc., Tome 1 (1891) no. 2, pp. 44-46. http://gdmltest.u-ga.fr/item/1183407222/