Challenger sketchbook : B. Shephard's sketchbook of the H. M. S. Challenger Expedition, 1872-1874 /
Shephard, Benjamin,1841-1887.
Stewart, Harris B.
Henderson, J. Welles(Joseph Welles),1920-
Philadelphia : Philadelphia Maritime Museum, 
1972.
Limited ed. of 100 copies.
Challenger Expedition, 1872-1876.