Kashfiyot
Xizmatlar
Identifikatsiya
Ishlab chiquvchilar uchun
Ekotizim
2 ta ish
Turkmen State Pedagogical Institute named Seidnazar Seydi
Z.O.Nurmatov, O.N.Chorshamiyeva, F.A.Pirimova
Z.O.Nurmatov, X.A.Tursunpo'latova, Z.N.Nasriddinova