Carta a Bertha Molina (Ruth), 4/2/1916
Carta a Bertha Molina (Ruth), 28/2/1916
Carta a Bertha Molina (Ruth), 9/3/1916
Carta a Bertha Molina (Ruth), 16/3/1916
Carta a Bertha Molina (Ruth), 2/4/1916
Carta a Bertha Molina (Ruth), 10/4/1916
Carta a Bertha Molina (Ruth), 11/4/1916
Carta a Bertha Molina (Ruth),16/4/1916
Carta a Bertha Molina (Ruth), 1/5/1916
Carta a Bertha Molina (Ruth), 7/5/1916
Carta a Bertha Molina (Ruth), 14/5/1916
Carta a Bertha Molina (Ruth), 19/5/1916
Carta a Bertha Molina (Ruth), 20/5/1916
Carta a Bertha Molina (Ruth), 1/6/1916
Carta a Bertha Molina (Ruth), 7/6/1916
Carta a Bertha Molina (Ruth), 8/6/1916
Carta a Bertha Molina (Ruth), 11/6/1916
Carta a Bertha Molina (Ruth), 13/7/1916
Carta a Bertha Molina (Ruth), 1-8-1916
Carta a Bertha Molina (Ruth), 11/8/1916
Carta a Bertha Molina (Ruth), 31/8/1916
Carta a Bertha Molina (Ruth), 17/9/1916
Carta a Bertha Molina (Ruth), 11/10/1916
Carta a Bertha Molina (Ruth), 21/11/1916
Carta a Bertha Molina (Ruth), [1916]
Carta a Bertha Molina (Ruth),18/10/1919
Carta a Bertha Molina (Ruth), 6/3/1920
Carta a Bertha Molina (Ruth), 30/6/1920
Tarjeta Postal a Bertha Molina (Ruth), 3/8/1920
Carta a Bertha Molina (Ruth), 16/10/1920
Lenin
Notas de la conferencia Elogio a Lenin
El hombre funesto del Zarismo. Rasputín [Recorte de Prensa]
E. D. Morel - Pedro S. Zulen
Panait Istrati
William J. Bryan
El sumo cicerone del foro romano
El sumo cicerone del foro romano
Edwin Elmore
José Ingenieros
El idealismo de Edwin Elmore
Paul Morand
Farinacci
James Joyce
"Dedalus" o la adolescencia de James Joyce
Una encuesta a José Carlos Mariátegui [Recorte de prensa]
Bernard Shaw
Bernard Shaw
Eugenio V. Debs
Krassin