| Jay Enoch 2006 , "History of Mirrors Dating Back 8000 Years", Optometry and Vision Science, Issue 10, Folder 83, Page: 775 | |
|---|---|
| Jhon Jewett, Raymond Serway 2010 , Physics For Scientists and Engineers With Modern Physics, Canada: Cenagage Learning, Page: 1043 |
.
19.
20.
16