Griffin, James B.
1964 Review of The Clam River Focus. Wisconsin Archeologist (old series) 45(2):104-111.
McKern, W. C.
1964 The Spencer Lake horse skull, Response to Mr. P.'s letter of June 28, 1963. Wisconsin Archeologist 45(2):118-120
1929 Wisconsin archeology in light of recent finds in other areas. Wisconsin Archeologist 20(1):1-5.
1942 The first settlers of Wisconsin. Wisconsin Magazine of History 26(2):153-169
1963 The Clam River Focus. Milwaukee Public Museum Publications in Anthropology No. 9. Milwaukee.
Mr. P.
1964 A Burnett County hoax. Wisconsin Archeologist 45(2):120-121
Ritzenthaler, Robert
1964 The riddle of the Spencer Lake horse skull. Wisconsin Archeologist 45(2):115-117
1966 Radiocarbon dates for Clam River Focus. Wisconsin Archeologist 47(4):219-220
