TY - BOOK AU - Clemens, C. Herbert (Charles Herbert) TI - Two-dimensional geometries : a problem-solving approach PB - American Mathematical Society PY - 2019 T2 - The Sally series VL - . Pure and applied undergraduate texts ; 34 EP - vii, 142 p. UR - https://ci.nii.ac.jp/ncid/BB28033211 SN - 9781470447601 ER -