- ArquivoJCM-F-03 - Fondo José Carlos Mariátegui
- Parte05 - Correspondencia JCM
- Série5.1 - Correspondencia Emitida
- 1915-12-02 - Carta a Ricardo Palma
- 1916-02-04 - Carta a Bertha Molina (Ruth), 4/2/1916
- 1916 - Carta a Bertha Molina (Ruth), [1916]
- 1916-02 - Carta a Bertha Molina (Ruth) [2/1916]
- 1916-02-28 - Carta a Bertha Molina (Ruth), 28/2/1916
- 1916-03-09 - Carta a Bertha Molina (Ruth), 9/3/1916
- 205 mais...