Gage, S. H. (1904). The microscope: An introduction to microscopic methods and to histology (9th ed., rev., enl. and illustrated by over two hundred figures.). Comstock Publishing Company.

Gage, Simon Henry. The Microscope: An Introduction to Microscopic Methods and to Histology. 9th ed., rev., enl. and illustrated by over two hundred figures. Ithaca, N.Y.: Comstock Publishing Company, 1904.

Gage, Simon Henry. The Microscope: An Introduction to Microscopic Methods and to Histology. 9th ed., rev., enl. and illustrated by over two hundred figures. Comstock Publishing Company, 1904.