Green, J. (., & Ewing, A. E. (1923). Optotypes, consisting of test-letters and pictographs for measuring the acuteness of vision. St. Louis: Mosby company C. V.
Chicago Style CitationGreen, John (1835-1913), and Arthur Eugene Ewing. Optotypes, Consisting of Test-letters and Pictographs for Measuring the Acuteness of Vision. St. Louis: Mosby company C. V, 1923.
MLA CitationGreen, John (1835-1913), and Arthur Eugene Ewing. Optotypes, Consisting of Test-letters and Pictographs for Measuring the Acuteness of Vision. St. Louis: Mosby company C. V, 1923.
Warning: These citations may not always be 100% accurate.