Naturalists - Biography. - United States

Aldo Leopold = his life and work / by: (書目-電子資源)

Thoreau in his own time = a biographical chronicle of his life, drawnfrom recollections, interviews, and memoirs by family, friends, and associates / by: (書目-電子資源)

Ghost birds = Jim Tanner and the quest for the ivory-billed woodpecker, 1935-1941 / by: (書目-電子資源)

Ecologie

Wisconsin

Ornithologists- United States

Ecologists- United States

Authors, American- 19th century

Leopold, Aldo,

Ecologists- Wisconsin

Naturalists- Wisconsin

Foresters- Wisconsin

Bossen

Ivory-billed woodpecker.

Wildlife managers- Wisconsin

Thoreau, Henry David,- Walden.

Tanner, James T.

Intellectuals- United States

Foresters- United States

Wilde dieren

Naturalists- United States

Verenigde Staten

Thoreau, Henry David,- Technique.

Wildlife managers- United States

Biologen