1 Pallas, Peter Simon, Pennant, Thomas, Urness, Carol Louise, James Ford Bell Collection. A naturalist in Russia; letters from Peter Simon Pallas to Thomas Pennant. Edited by Carol Urness Minneapolis, 1967 University of Minnesota Press 189 p. "A publication from the James Ford Bell Collection in the University of Minnesota Library." "Major writings of Pallas and Pennant": p. 176-178. Bibliographical footnotes.