Prospect of environmental administration in 1998. Present state and problems of water supply.
1998 ◽
Vol 27
(1)
◽
pp. 24-27
1995 ◽
Vol 24
(1)
◽
pp. 44-48
1998 ◽
Vol 27
(1)
◽
pp. 67-70
1991 ◽
Vol 20
(1)
◽
pp. 45-50
1995 ◽
Vol 24
(1)
◽
pp. 20-25