Kovalevsky, Egor Petrovich books & textbook
. . .. (English and Russian Edition)
British Library, Historical Print Editions /2012-07-01 Paperback / 182 Pages
isbn-10: 1249011515 / isbn-13: 9781249011514
.. (Bulgarian and English Edition)
Kovalevsky, Egor Petrovich Markov, E S
British Library, Historical Print Editions /2011-06-01 Paperback / 336 Pages
isbn-10: 1241741816 / isbn-13: 9781241741815
