Subject

Esperanto -- Congresses books

2 free books about esperanto -- congresses, free to read online. Chapter 1 of any book is free, no account needed.

Raporto pri la oka kongreso de esperantistoj (Krakovo 1912)

Ned Katryn

A Blind Esperantist's Trip to Finland and Sweden, to Attend the Fourteenth International Esperanto Congress

W. Percy Merrick