YCKET XIX/204
YDE XXII/141 - XXIII/122, 281, 288
YDUIT XIX/340
YSEBAERT III/169 - XI/148, 149, 155, 156, 159, 160 - XIV/190 - XXIV/143 - XXVI/54, 59
YSENBRANDT XI/309
YSERBYT IV/214
YSSERMAN IV/79 - XVII/219