.c1, .c2, .c3, .c4 {text-align:center;margin-top:1pc; margin-bottom:1pc; }
.c1 {font-size:120%;letter-spacing:2px;}
.c2 {font-variant:small-caps;}
.c3 {font-size:95%;font-weight:bold;}
.c4 {font-size:110%; font-style:italic;}
.ct .reference {font-size:0.8pc;}
