Nature North: bilogía de la lombriz NNZ-Nightcrawler http://www.naturenorth.com/fall/ncrawler/ncrawler2.html NNZ-Nightcrawler Nature North: A biologia de um minhoca [em inglês] NNZ-Nightcrawler NNZ-Nightcrawler NNZ-Nightcrawler NNZ-Nightcrawler Nature North: Biology of the Nightcrawler NNZ-nightcrawler - NatureNorth.com Nature North: Biologia da minhoca-da-terra [em inglês]