Marsh, W. A. (1887). Brief notes on the land and fresh-water shells of Mercer Co., Ill. The Conchologists' Exchange. 1(8): 42-43; 1(9-10): 50-51; 1(11): 62-63; 1(12): 74-75; 2(1): 4-5; 2(2): 20-21; 2(3): 36-37; 2(4): 48-50; 2(5): 65-67; 2(6): 80-81.
221600
Marsh, W. A.
1887
Brief notes on the land and fresh-water shells of Mercer Co., Ill.