The main directions of improving the communication system and feedback of the service companies (vympel llc)
2014 ◽
Vol 23
(2)
◽
pp. 104-111
◽
1982 ◽
Vol 47
(4)
◽
pp. 373-375
◽
2017 ◽
Vol 17
(2)
◽
pp. 142-154
◽
1998 ◽
Vol 27
(6)
◽
pp. 358-362
◽
1996 ◽
Vol 17 (First Serie
(1)
◽
pp. 49-61
◽