Hardcover binding is firm and hinges are not cracked or damaged. Pages are tight and clean. Boards and DJ have light shelfwear and rubbing. Library discard with usual marks and attachments. Pocket removed. DJ protected with mylar. 93 pages. HardCover Binding. Year: 1971. ISBN: 0843739126. The author presents fifteen visionaries who pierced the murky smog of unchecked industrial grown, the inexorable population expansion and the dislocation of the natural forces of our world. Some of the better known exponents of ecological reform who appear here are Henry Thoreau, George Washington Carver, Theodore Roosevelt and Rachel Carson, plus other warriors in the battle against self destruction, such as Alexander Wilson, John Muir and Joseph Wood Kruthc.