Over, William H. 1866-1956. A preliminary report of a biological survey of the lakes of South Dakota, by William H. Over and Edward P. Churchill. - Vermillion, S.D., 1927. - 18 p. Bulletin, University of South Dakota, ser. 27, no. 6. March, 1927. LCCN: gs 27000136 Subjects--Topical Terms: Lakes--South Dakota.Natural history--South Dakota. LC Class. No.: QH98 / .O8