mercury vapor lamps 
| Title |
Date |
Author |
|---|---|---|
| Characteristics of 400-Watt and 250-Watt Type H Mercury Lamps | Jun 01, 1936 | J. A. St. Louis |
| Title |
Date |
Author |
|---|---|---|
| Characteristics of 400-Watt and 250-Watt Type H Mercury Lamps | Jun 01, 1936 | J. A. St. Louis |