Saǵındikov, B. “1937-1938 -JÍLLARDA QUWDALAWǴA USHÍRAǴAN QARAQALPAQ ZÍYALÍLARÍ HAQQÍNDA”. SCIENCE and SOCIETY, no. 3-1, Sept. 2020, pp. 29-31, https://journal.ndpi.uz/ss/article/view/2020-3-1-013.