nuc85-31602: Her Secrets of dethroned royalty [MI] 1920 (hdg. on MiU rept.: Radziwill, Ekaterina (Rzewuska) kni︠a︡gina, 1858-1941; usage: Princess Catherine Radziwill)
LC data base, 6/13/85 (hdg.: Radziwill, Catherine, Princess, 1858-1941)
Princess from St. Petersburg, 2000: t.p. (Princess Catherine Radziwill) p. 367 (also wrote under the pseudonyms Count Paul Vassili and Hildegarde Ebenthal)