Loughlin, G. F. (1880-1946) Loughlin, Gerald Francis (1880-1946) Stany Zjednoczone. Geological Survey
Loughlin, Gerald Francis (1880-1946) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Loughlin, Gerald Francis (1880-1946) United States of America. Geological Survey.
Loughlin, Gerald Francis (1880-1946) Stany Zjednoczone. Geological Survey
Loughlin, Gerald Francis (1880-1946) Stany Zjednoczone. Geological Survey