TY - JOUR AU - Radó, F. TI - Congruence-Preserving Isomorphisms of the Translation Group associated with a Translation Plane JO - Canadian journal of mathematics PY - 1971 SP - 214 EP - 221 VL - 23 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-021-5/ DO - 10.4153/CJM-1971-021-5 ID - 10_4153_CJM_1971_021_5 ER -