HOWELL F CLERK. (1980). EARLY MAN (2ND.). TIME LIFE BOOKS.
Chicago-čujuhus (17. p.)HOWELL F CLERK. EARLY MAN. 2ND. HONGKONG: TIME LIFE BOOKS, 1980.
MLA-čujuhus (9. p.)HOWELL F CLERK. EARLY MAN. 2ND. TIME LIFE BOOKS, 1980.
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