Bergman, C. Wild echoes : Encounters with the most endangered animals in North America. Anchorage etc.: Alaska Northwest Books, 1990 X, 323 p. : tab., 8 p. ill. 0-88240-404-0.
Bergman, C. Wild echoes : Encounters with the most endangered animals in North America. Anchorage etc.: Alaska Northwest Books, 1990 X, 323 p. : tab., 8 p. ill. 0-88240-404-0.
Bergman, C. (1990) Wild echoes : Encounters with the most endangered animals in North America, Anchorage etc.: Alaska Northwest Books X, 323 p. : tab., 8 p. ill. 0-88240-404-0.
Bergman, C. (1990). Wild echoes : Encounters with the most endangered animals in North America. Anchorage etc.: Alaska Northwest Books, X, 323 p. : tab., 8 p. ill.
Bergman C. Wild echoes : Encounters with the most endangered animals in North America. Anchorage etc.: Alaska Northwest Books; 1990. p. X, 323 p. : tab., 8 p. ill. ISBN: 0-88240-404-0.