Murrill, William A. (1908). "The boleti of the Frost herbarium". Bulletin of the Torrey Botanical Club. 5 (11): 517–26. doi:10.2307/2479107. JSTOR2479107.
Murrill, William A. (1908). "The boleti of the Frost herbarium". Bulletin of the Torrey Botanical Club. 5 (11): 517–26. doi:10.2307/2479107. JSTOR2479107.