Soviet penal policy: a background book

by: Lapenna, Ivo
Published: London [u.a.] : The Bodley Head, 1968

Marxism and the Soviet constitutions

by: Lapenna, Ivo
Published: London : Institute for the Study of Conflict, 1979

The Language problem in international relations: a lecture; delivered at the first international conference on the language problem in science and learning (Copenhagen, 5-11th August 1962)

by: Lapenna, Ivo
Published: London : Universal Esperanto Ass., 1962

Die Rechtsnatur des gesellschaftlichen Eigentums in Jugoslawien

by: Lapenna, Ivo
Published in: Osteuropa <Berlin> / Osteuropa-Recht (1962)

Lenin, law and legality

by: Lapenna, Ivo
Published: London : Ampersand, 1970

Human rights:

by: Lapenna, Ivo
Published: London : Inst. for the study of conflict, 1977

Legal nature of the CSCE Final Act and Human Rights under international and Soviet law

by: Lapenna, Ivo
Published in: Jahrbuch für Ostrecht (1978)

The Soviet concept of "socialist" international law

by: Lapenna, Ivo
Published in: The yearbook of world affairs (1975)

Doctor L.L. Zamenhof's greatness

by: Lapenna, Ivo, 1909-1987
Published: London : Universal Esperanto Association, 1959

Yes, esperanto is the answer to the world language problem

by: Lapenna, Ivo, 1909-1987
Published: London : Universal Esperanto Association, 1964

Esperanto en perspektivo: faktoj kaj analizoj pri la internacia lingvo

Published: London [u.a.] : Universala Esperanto-Asocio, 1974