Herrera, K.; Cóbar, O.; Barrios, R.; Pierola, K. .; Chamalé, W. .; Rosales, C.; Quan , J. .; Moreno, M.; Paxtor, J.; Maas, J. Evaluation of Air Pollution by Microscopic Fungi in Two Biological collections and two museums of Guatemala. Rev.Cient. 2015, 25, 43-58.