Ruth E. Shea

Trumpeter Swan Cygnus buccinator range expansion programs in the northern Rocky Mountains, USA

Carl D. Mitchell, Ruth E. Shea, D. C. Lockman, 2013 .

buccinator range expansion programs in the northern Rocky Mountains, USA

Carl D. Mitchell, Ruth E. Shea, D. C. Lockman, 1991 .

The ecology of trumpeter swan in Yellowstone National Park and vicinity

Ruth E. Shea, 1979 .