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Natural versus anthropogenic emissions of trace metals to the atmosphereNRIAGU, J. O.NATO ASI series. Series C, Mathematical and physical sciences. 1989, Vol 268, pp 3-13Conference Paper

Investigation of a buried vertical fault with natural and controlled source AMT = Etude d'une faille verticale enfouie par sondage audiomagnétotellurique à source contrôlée et naturelleSCHNEGG, P.-A; FISCHER, G; LE QUANG, B. V et al.Annales geophysicae. Series B. Terrestrial and planetary physics. 1986, Vol 4, Num 2, pp 139-144Article

Natural and anthropogenic sources of ozone depletion in polar areas: climatic and oceanic consequencesCALI, G; MAZZARELLA, A; PALUMBO, A et al.Nuovo cimento della società italiana di fisica. C. 1989, Vol 12, Num 1, pp 107-111, issn 0390-5551Article

Isolation and characterization of aerobic heterotrophic bacteria from natural spring waters in the Lanjaron area (Spain)QUEVEDO-SARMIENTO, J; RAMOS-CORMENZANA, A; GONZALES-LOPEZ, J et al.Journal of applied bacteriology. 1986, Vol 61, Num 4, pp 365-372, issn 0021-8847Article