For citations:

Lazarev O.E., Lazareva O.S., Shalaeva M.V., Shekotilova S.N., Shekotilov V.G. A method of using large-scale topographic maps of provinces surveyed by A. I. Mende in GIS and geoportals. Proceedings of the Russian Geographical Society. 2017;149(2):50-60. (In Russ.)