Vol. s3-28, Issue 163, 1884July 01, 1884 EDT
Memorials of George Engelmann and of Oswald Heer
Memorials of George Engelmann and of Oswald Heer
Asa Gray,
Gray, A. (1884). Memorials of George Engelmann and of Oswald Heer. American Journal of Science, s3-28(163), 61–69. https://doi.org/10.2475/ajs.s3-28.163.61