Two studies on hours of work.

London : H.M.S.O., 1928.

iii, 35 pages : illustrations ; 25 cm.

At head of title: Medical Research Council. Industrial Fatigue Research Board.

1. Five-hour spells for women, with reference to rest pause / by H.M. Vernon and M.D. Vernon, assisted by I. Lorrain-Smith.--2. The two-shift system in certain factories / by May Smith and M.D. Vernon