Names
- Pearl, Raymond, 1879-1940.1
- Pingree, Hazen S., 1840-1901.1
- Pingree, Hazen Smith (1840-1901)1
- Project Michigan.1
- Putnam, Frederic Ward (1839-1915)1
- Putnam, Frederic Ward, 1839-1915.1
- Rackham Arthritis Research Unit (University of Michigan)1
- Reighard, Jacob Ellsworth, 1861-19421
- Reighard, Jacob Ellsworth, 1861-1942.1
- Ruthven, Alexander Grant (1882-1971)1
- Ruthven, Alexander Grant, 1882-1971.1
- Sawyer, Ralph A. (Ralph Alanson), 1895-1978.1
- Seismological Society of America. Eastern Section.1
- Shull, Aaron Franklin (1881-1961)1
- Shull, Aaron Franklin, 1881-1961.1
- Smith, William Alden (1859-1932)1
- Smith, William Alden, 1859-1932.1
- Sparrow family.1
- Sparrow, Frederick K. (Frederick Kroeber), 1903-19771
- Sparrow, Frederick K. (Frederick Kroeber), 1903-1977.1