%0 Journal Article %A Burgess, W. %T The Meaning of Mono and EPI in Some Familiar Categories %J Canadian mathematical bulletin %D 1965 %P 759-769 %V 8 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-056-x/ %R 10.4153/CMB-1965-056-x %F 10_4153_CMB_1965_056_x