More from this Author
Found 4 books by Erkki Pehkonen (Editor)
Beliefs
by Gilah C. Leder (Editor), Erkki Pehkonen (Editor), Günter Törner (Editor)
Posing and Solving Mathematical Problems
by Patricio Felmer (Editor), Erkki Pehkonen (Editor), Jeremy Kilpatrick (Editor)
Posing and Solving Mathematical Problems
by Patricio Felmer (Editor), Erkki Pehkonen (Editor), Jeremy Kilpatrick (Editor)
Beliefs
by Gilah C. Leder (Editor), Erkki Pehkonen (Editor), Günter Törner (Editor)