Links:
[1] http://www.defenders.org/publication/endangered-species-act-101-0
[2] http://www.defenders.org/publication/endangered-species-act-bang-our-buck
[3] http://www.defenders.org/publication/endangered-species-act-just-facts
[4] http://www.defenders.org/publication/endangered-species-act-what-good-are-they
[5] http://www.defenders.org/publication/back-brink-northeast
[6] http://www.defenders.org/publication/back-brink-southeast
[7] http://www.defenders.org/publication/back-brink-southwest
[8] http://www.defenders.org/publication/back-brink-west
[9] http://www.defenders.org/sites/default/files/publications/assault_on_wildlife_the_endangered_species_act_under_attack.pdf
[10] http://www.defenders.org/publications/esa-101.pdf
[11] http://www.defenders.org/publications/economic_benefits_of_the_esa.pdf