Ruth Barcan Marcus
[ar] روث بركان ماركوس
[ca] Ruth Barcan Marcus
[da] Ruth Barcan Marcus
[de] Ruth Barcan Marcus
[es] Ruth Barcan Marcus
[fi] Ruth Barcan Marcus
[fr] Ruth Barcan Marcus
[is] Ruth Barcan Marcus
[it] Ruth Barcan Marcus
[nb] Ruth Barcan Marcus