Ríos, B., Ramírez-Arriaga, E., Reyes-Salas, M., Martíez-Hernández, E. and Rosas, I. 2014. Airborne Pollen Grains Collected In An Urban Area: Merced, Mexico City. Acta Microscopica. 23, 3 (Nov. 2014), 181-187.