. Bulletin de l'Acadmie impriale des sciences de Science; Science -- Soviet Union. M l Fig. 2 i P n-^ }ïL- 1 w ^<i _â-â^. â 7<1^ â -?-/J^ ( l âr \ i ^ '"-C? \ / 0 l-r^ 7 J Us .. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Imperatorskaia Akademiia nauk (Russia). [St. -Ptersbourg], Acadmie impriale des sciences

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