Tra la mondo : internacia legolibro : IIa parto : Por progresinto : Kun aldono de 4 komponaĵoj [ = Through the World : International Reading Book : part 2…] / kolektita kaj prilaborita de Paul Bennemann
Esperanto/Languages, Artificial [Constructed]/Language, Universal
Language and languages -- Study and teaching/Language and education/Language and languages/Communication/Sociology/Social sciences/Civilisation
Esperanto -- Readers/Languages, Artificial [Constructed]/Language, Universal