"Donbass has been the subject of close study by many prominent people. Ore miner Grigory Kapustin, chemist D.I. Mendeleev, writers A.P. Chekhov, V.V. Veresaev, artist N.A. Kasatkin, geologist L.I. Lutugin, revolutionaries G.I. Petrovsky and Artem (F.A. Sergeev), statesmen G.K. Ordzhonikidze and M.I. Kalinin. This edition contains statements by prominent people about Donbass."