lighting flux 
| Title |
Date |
Author |
|---|---|---|
| The Calculation of Illumination by the Flux of Light Method | Oct 02, 1908 | J. R. Cravath, V. R. Lansingh |
| Title |
Date |
Author |
|---|---|---|
| The Calculation of Illumination by the Flux of Light Method | Oct 02, 1908 | J. R. Cravath, V. R. Lansingh |