Die Association for the improvement of geometrical teaching.
Geometrie Bd. 2, GDML_Books, (1968), p. 232 / Harvested from
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@article{PPN37649882X+dmdlog125,
     title = {Die Association for the improvement of geometrical teaching.},
     booktitle = {Geometrie Bd. 2},
     series = {GDML\_Books},
     year = {1968},
     pages = {232},
     url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog125}
}

 (éd.). Die Association for the improvement of geometrical teaching., dans Geometrie Bd. 2, GDML_Books,  (1968), p. 232. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog125/