(1967). On the track of discovery. Progress.
Chicago-čujuhus (17. p.)On the Track of Discovery. Moscow: Progress, 1967.
MLA-čujuhus (9. p.)On the Track of Discovery. Progress, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.