D. D. PolozhentsevH. I. PotterJ. A. ZelayaR. Zalles2026-03-222026-03-22199110.1007/bf00643679https://doi.org/10.1007/bf00643679https://andeanlibrary.org/handle/123456789/62345enObservatoryPhysicsAstronomyStarsCometAstrometryAstrobiologyAstrophysicsA new Bolivia-USSR astronomical observatory and its astrometric activitiesarticle