11,4=15,6; 12,1=17,1; 14,1=24,6; 14,2=24,9; 16,2=28,7; 17,3=29,14; 18,2=30,11; 18,4=31,15; 19,3=32,12; 20,1=32,15; 20,2/3=33,2; 21,1=33,16; 22,1=34,14; 22,2/3=35,12; 23,1=35,15 von: University of Colorado Boulder: University of Colorado bulletin
16,2=256; 17,3=275; 18,2=286; 18,4=303; 19,3=316; 20,1=319; 20,2/3=322; 21,1=536; 22,1=350; 22,2/3=364; 23,1=367 von: University of Colorado Boulder: [University of Colorado bulletin / General series]
17,3=1929; 18,2=1930; 19,1=1931; 20,1=1932; 21,1=1933; 22,1=1934; 23,1=1935; 24,1=1936; 25,1=1937 von: University of Colorado Boulder: Abstracts of theses and reports for higher degrees
