DETERMINING DEFLECTIONS OF THE VERTICAL IN THE WESTERN SIBERIA REGION: THE RESULTS OF COMPARISON Статья Kosarev N.S., Kanushin V.F., Kaftan V.I., Ganagina I.G., Goldobin D.N., Efimov G.N. Gyroscopy and Navigation. Pleiades Publishing. Том 9. 2018. С. 124-130