@book{Kropotkin, author = {Kropotkin, P. A.}, title = {Mutal aid, Boston (Extending Horizons Books) 1955.}, language = {en} } @book{Kropotkin, author = {Kropotkin, P. A.}, title = {The great French revolution 1789-1793. Vol. II, New York (Vanguard Press) 1929.}, language = {en} } @book{Kropotkin, author = {Kropotkin, P. A.}, title = {Russian and French Prisons, London (Ward and Downey) 1887.}, language = {en} } @book{Kropotkin, author = {Kropotkin, P. A.}, title = {Ethics. Origin and development, New York (Tudor Publishing) 1922.}, language = {en} } @book{Kropotkin, author = {Kropotkin, P. A.}, title = {The great French revolution 1789-1793. Vol. I, New York (Vanguard Press) 1929.}, language = {en} }