La strukturo di la linguo internaciona Ido : kontenanta la gramatiko di Ido, la afixi e listo de mil vorti Ido kun traduko aden Germana, Angla, e Franca by Henry Jacob. ISBN 0902489003. Published by International Language (Ido) Society of Great Britain in 1970. Publication and catalogue information, links to buy online and reader comments.