Julius Margolin's book A Travel to the Land Ze-Ka was finished in 1947, but it was impossible to publish such a book about the Soviet Union at the time, immediately after World War II.
Buku Julius Margolin A Travel to the Land Ze-Ka (Perjalanan ke Negeri Ze-Ka) diselesaikan pada 1947, tetapi buku seperti itu tidak mungkin diterbitkan di Uni Soviet pada masa itu, segera setelah Perang Dunia II.