TY - JOUR AU - Fitz-Gerald, D. G. TI - Divisibility in categories of a class which includes the category of binary relations JO - Glasgow mathematical journal PY - 1976 SP - 22 EP - 30 VL - 17 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002676/ DO - 10.1017/S0017089500002676 ID - 10_1017_S0017089500002676 ER -