25=17,2; 26=17,4; 27=18,2; 28=19,2; 29/30=20,1/2; 31=21,1; 32/33=21,2/3; 34/35=23,1/2; 36=24,1; 37=24,2; 38/39=25,1/2; 40=26,1; 41=27,3; 42=27,4; 43=28,3; 44=30,1; 45=31,2; 46=32,2; 47=33,1; 48=33,3; 49=34,2; 50=34,3; 51=35,1/2; 52=35,3/4; 53=36,4; 54=40,1/2 von: Cartographica (ISSN: 0340-0654)
12=Index 1/10; 24=Index 11/15 von: The Canadian cartographer (ISSN: 0008-3127)