Doniyor Mirzoev Erkinovich. “ERATOSFEN GʻALVIRI VA UNING MAKTAB DARSLIGIDAGI AHAMIYATI”. TADQIQOTLAR.UZ 40, no. 5 (June 22, 2024): 101–103. Accessed November 20, 2024. https://tadqiqotlar.uz/new/article/view/3986.