Hudgins, B. B. (1966). Problem solving in the classroom. Mac Millan.
Chicago-čujuhus (17. p.)Hudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
MLA-čujuhus (9. p.)Hudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
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