Photographing shaft interiors by reflected sunlight : W. W. Fleming, of the U. S. Geological Survey, describes in Mining and Metallurgy, Vol. 17, No. 350

✍ Scribed by R.H.O.

• Publisher: Elsevier Science
• Year: 1936
• Tongue: English
• Weight: 62 KB
• Volume: 221
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(36)90528-8