Revision of the Echini
MLA
Agassiz, Alexander, 1835-1910. "Revision of the Echini." HathiTrust. 1872/1874, http://hdl.handle.net/2027/uc1.31822033838632.
APA
Agassiz, Alexander, 1835-1910 (1872/1874). Revision of the Echini. Retrieved from http://hdl.handle.net/2027/uc1.31822033838632
Chicago
Agassiz, Alexander, 1835-1910. "Revision of the Echini." 1872/1874. July 10, 2025. http://hdl.handle.net/2027/uc1.31822033838632.