Effective lengths of column in multistorey buildings /
Wood, Randal Herbert.
Garston :  Building Research Establishment, 
1974.
This paper is reprinted from the Structural Engineer where it appeared in 3 parts: Vol. 52, No. 7, July 1974, pp. 235-244; Vol. 52, No. 8, August 1974, pp. 295-302; Vol. 52, No. 9, Sept., 1974, pp. 341-346. The paper was read at the Institution of Structural Engineers, London, 24 October, 1974.