The Dictionary of Hungarian Sign Language was published by the National Association for the Deaf and Hard of Hearing in 1999. Its aim is to "support the claim that HSL is a natural language with its own vocabulary and grammar independent of spoken Hungarian and other sign languages" more than just a reference book to help learners. [p. xviii]
Lancz, Edina. Dictionary of Hungarian Sign Language. National Association for the Deaf and Hard of Hearing, 1999. ISBN 963-03-7667-9.