Esperanto, interlinguistics, and planned language /
edited by Humphrey Tonkin
. – Lanham. Md : Rotterdam ; West Hartford, CT : University Press of America ; Center for Research and Documentation on World Language Problems, 1977
. – XXIII, 232 p. ; 24 cm
. – (Papers on the Center for Research and Documentation on World Language Problems ; 5) .
Kolekto de artikoloj unue publikigitaj en "Language problems and language planning" .