Published
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Air pollution as a result of the development of motorization
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mzabochnicka@is.pcz.czest.pl et al.
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Published
Water demand and supply analysis using a spatial decision support system
by E. Manoli, G. Arampatzis, Ev. Pissias, D. Xenos, D. Assimacopoulos
Published
Malaria situation in Bulgaria and surveillance measures (1991-2000)
by Kurdova R.I., Vutchev D.I., Petrov P.P.