Thomas Wayland Vaughan—USGS—Great Plains methods.
George Otis Smith and John Duer Irving—USGS—Lake Superior and Adirondack methods.
Josiah Edward Spurr and Alfred Hulse Brooks—USGS—Reconnaissance methods.
(Charles) Whitman Cross† and Henry Ward Turner—USGS—Rocky Mountains and Sierra Nevada methods.
Waldemar Lindgren†—USGS—Mining methods.
† GSW Founder
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