May, J. (1963). There's advanture is geology. Bailey.
Chicago-čujuhus (17. p.)May, Julian. There's Advanture Is Geology. London: Bailey, 1963.
MLA-čujuhus (9. p.)May, Julian. There's Advanture Is Geology. Bailey, 1963.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.