POLYMERIC FILTERING MATERIAL
A Standard patent application filed on 29 July 1983 credited to Ljubman, Nazar Yankelevich
;
Imangazieva, Gulsara Kenzhesovna
;
Kim, Zinaida Ilinichna
;
Uskov, Alxandr Ivanovich
;
Sydykova, Tokhtobubu Chymyrbaevna
;
Nugmanova, Lyalya Talipvna