1979

University of Nebraska Press

1966

University of Nebraska Press

1984

University of Nebraska Press

Lincoln, University of Nebraska Press. 1990

Lincoln: University of Nebraska Press

Lincoln: University of Nebraska Press

Lincoln and London, University of Nebraska Press, 1987. - Reprint of the edition 1933. -

1979

University of Nebraska Press, Lincoln + London

Lincoln / University of Nebraska Press

Lincoln, University of Nebraska Press

LIncoln : University of Nebraska Press

Lincoln, University of Nebraska Press

Lincoln: University of Nebraska Press

Lincoln-London, University of nebraska Press. 1995

Lincoln-London, University of nebraska Press. 1992