Moscati, Spitaler, Ullendorff, Von Soden 1969

Full Citation
Moscati, S., Spitaler, A., Ullendorff, E., Von Soden, W. An Introduction to the Comparative Grammar of the Semitic Languages: Phonology and Morphology (2nd. printings). (Porta Linguarum Orientalium. New Series, 6). Wiesbaden: Harrassowitz, 1969.