Major - Prdromo - New paperback or softback - X555z

Rod - Universal Language Telepathy - New paperback or softback - X555z

Bauer - Spelin A Universal Language - New paperback or softback - 95 - X555z

K - Major General Samuel Peter Heintzelman - New paperback or softback - X555z

Cullum - Major-General Richard Montgomery - New paperback or softback - X555z

Hill - Vocabulary Of The Shoshone Language - New paperback or softback - X555z

Fig - 30 Day Language Learning Challenge - New paperback or softback - X555z

Kirchhoff - Volapuk on Universal Language - New paperback or softback - X555z