Present Philosophical Tendencies : a Critical Survey of Naturalism, Idealism, Pragmatism, and Realism, Together With a Synopsis of the PhilRalph Barton PerryVypredanáPostrážiť
The Free Man and the Soldier; Essays on the Reconciliation of Liberty and DisciplineRalph Barton PerryVypredanáPostrážiť
The Present Conflict of Ideals ; a Study of the Philosophical Background of the World WarRalph Barton PerryVypredanáPostrážiť
