(1)
Carballal, R.; Garci?a Molares, A. Assessment of Atmospheric Contamination by SO2 in the Area of Ferrol-Fene (La Coruña) by Means of Epiphytic Lichens. abm 1991, 16 (1), 197-206. https://doi.org/10.24310/abm.v16i.9183.