Recent Monographs of Bell System Technical Papers Not Published in this Journal

Telephone-System Applications of Recorded Machine Announcements, Monograph 2213. BOGERT, B . P . On the Band Width of Vowel Formants, Monograph 2167. BROWN, W . L . N-Type Surface Conductivity on P-Type Germanium, Monograph 2173. BURTON, J . A . , HULL, G . W . , MORIN, F . J . , a n d SEVERIENS, J . C . Effects of Nickel and Copper Impurities on the Recombination of Holes and Electrons in Germanium, Monograph 2193. BURTON, J . A . , PRIM, R . C . , SLICHTER, W . P . , KOLB, E . D . , a n d STRUTHERS, J . D .