References.
- Hoare, A. H. (1945). Vegetable crops for market. Crosby Lockwood & Son Ltd., London.
- Johnstone, K. (1952). Vegetable culture. Thomas Nelson & Sons Ltd., London.
- Mercer, S. P. (1952). Farm and garden seeds. Crosby Lockwood & Son Ltd., London.
- Oldham, C. H. (1950). Vegetable growers’ handbook. Crosby Lockwood & Son Ltd., London.
- Warne, L. G. G. (1951a). Spacing experiments on vegetables. I–The effect of the thinning distance on earliness in globe beet and carrots in Cheshire, 1952. J. hort. Sci., 26, 79–83.
- Warne, L. G. G. (1951b). Spacing experiments on vegetables. II–The effect of the thinning distance on the yields of globe beet, long beet, carrots and parsnips in Cheshire, 1952. J. hort. Sci., 26, 84–97.
- Warne, L. G. G. (1951c). Spacing experiments on vegetables. IV–The yield of globe beet grown at twelve spacings and two manurial levels, in Cheshire, 1952. J. hort. Sci., 26, 296–303.