Permanent Elements in the Flux of Present-Day Physics
New York City: The Science Press, 1930. First Edition. 8vo., paged [19]-24; Fair; no cover, stapled pages, tears at all edges throughout, curling at right edge throughout, at top of first page is a library stamp, a date stamp, and an ink notation, center creased throughout; last page has library stamp at bottom edge; "Science, Vol. LXXI, Friday, January 10, 1930, No. 1828." More