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ипрский ярусstresses
geol. Yp (MichaelBurov); Ypresian (MichaelBurov)
stratigr. Ypresian Stage (MichaelBurov); Ypresian strata (MichaelBurov); Ypresian sequence (MichaelBurov)
 Russian thesaurus
ипрский ярус
geol. ипр (MichaelBurov)