1. Standard Methods for the Examination of Water and Wastewater;APHA,1975
2. Caracteristicas fisico-quimicas de las aguas superficiales de les principales rios de Bizkaia;Bikuiia,1987
3. Temperature studies on a river system in north-east England;Boon;Freshwat. Biol.,1976
4. Hydrochimie de la riviere Lot;Capblano;Annals Limnol.,1978
5. Comparative study of physical-chemical variables of streams using mutivariate analyses;Cushing;Arch. Hydrobiol.,1980