W. I. Marshall (1840-1906) was publisher of stereo-views of Yellowstone National Park and conducted tours of the park. He was also a historian, writing extensively on Marcus Whitman and Oregon. William Isaac Marshall was born June 25, 1840 in Fitchburg, Massachusetts. He arrived in Montana in 1866 and lived there until 1875. He purchased a large Yellowstone and Montana photo collection of 122 stereo-views (taken by Joshua Crissman). Marshall sold these photographs under his own copyright in the 1870s. He visited Yellowstone with his family in 1873 and 1875, claiming to have been the first to take children through the park. In 1875, he moved back to Fitchburg, Massachusetts. In 1879, he proposed conducting commercial tours of Yellowstone. In 1887, he moved to Chicago and became principal of the Gladstone School. He gave over two hundred lectures on Yellowstone, Yosemite, and mining. He died on October 30, 1906 in Chicago, Illinois.

Paul Rubinstein (born 1961) is an author and former air traffic controller in Virginia. Paul Rubinstein was born in Oakland, California, in 1961. He graduated from Shattuck-St. Mary's High School in Faribault, Minnesota, in 1979, and California State University-Chico with a B.A. Geography in 1986. He worked as an air traffic controller in Minnesota and Wyoming. In 2000, Rubinstein co-authored the book, The Guide to Yellowstone Waterfalls and Their Discovery. In 2001, he founded a Yellowstone stereoview distribution business called YnpCollector Stereoviews.

Joshua Crissman (1833-1922) was a photographer in the Western United States. Joshua Crissman was born July 29, 1833 in Madison, Ohio. He probably began taking photographs during the Civil War, and moved to the Western United States circa 1868. He moved around Wyoming and Utah taking pictures, and he settled in Bozeman, Montana in 1871, where he was involved with William Henry Jackson in taking photos for the Hayden expedition of Yellowstone country. The stereoviews produced during this expedition, and Crissman's willingness to sell them to individuals and companies for publication, helped make him a popular photographer. After the scientific expedition, Crissman continued photographing Yellowstone's geysers, springs, and tourist attractions until the summer of 1874. His stereograph series, from 1871-1874, are called the "Views of Yellowstone National Park." Around 1874 he again moved around the western United States and continued to operate photography companies until his death in 1922.