David Singmaster
[arz] ديفيد سينجماستر
[de] David Singmaster
[es] David Singmaster
[eu] David Singmaster
[fr] David Singmaster
[ht] David Singmaster
[id] David Singmaster
[it] David Singmaster
[pt] David Singmaster
[ru] Сингмастер, Дэвид