Chaadaev, P. I︠A︡. (Petr I︠A︡kovlevich), 1794-1856 (Personal Name)
- Чаадаев, П. Я. (Петр Яковлевич), 1794-1856
- Earlier heading: Chaadaev, Petr I︠A︡kovlevich, 1794-1856
- Tschaadajew, Peter J., 1794-1856
- Čaadaev, Peter Jakovlevič, 1794-1856
- Chaadayev, Peter, 1794-1856
- Tchaadaev, Pierre, 1794-1856
- Čaadàev, Pëtr Jakovlevič, 1794-1856
- Čaadaev, Pietro, 1794-1856
- Chaadaev, Peter, 1794-1856
- Csaadajev, Pjotr Jakovlevics, 1794-1856
- Tchadaïef, Pierre, 1794-1856
Non-Latin script reference not evaluated.
Tarasov, B.N. V mire cheloveka, 1986: p. 264 (P.I︠A︡. Chaadaev; Petr I︠A︡kovlevich Chaadaev)
LC data base, 12-1-86 (hdg.: Chaadaev, Petr I︠A︡kovlevich, 1794-1856; usage: Pëtr Jakovlevič Čaadàev; Peter Chaadaev, Peter Chaadayev) LC manual cat. (usage: Pierre Tchaadaev, Peter Jakovlevič Čaadaev; Pietro Čaadaev; Peter J. Tschaadajews)
Filosoficheskie pisʹma, 1987: t.p. (Petr Chaadaev)
Köves, E. Az orosz dilemma, c1987: t.p. (Csaadajev) p. 5 (Pjotr Jakovlevics Csaadajevről)
Oeuvres choisies de Pierre Tchadaïef, 1862.
Info. from 678 field, 2012-12-30 (Russian philosopher; wrote in Russian and French)