hardcover. 2 large thick 8vo volumes, black cloth. Various places & various dates, (1920s-1940s). Very good. very good(+).
The largest number of articles is by Babkin, with other authors including M. H. F. Friedman, Rhoda Grant, S. A. Lomarov, G. O. Langstroth, J. V. V. Nicholls, G. W. Stavrasky, D. R. Webster, L. A. Andreyev, etc.