Home Office (1990). Guidance on the Operation of the Animals Scientific Procedures Act 1986.62 pp. London: HMSO.
2.
BallsM., HollandsC., and MortonD.B. (1990). Unacceptable suffering in a British laboratory. Statement issued on 9 May 1990. Nottingham: FRAME.
3.
HampsonJ., SoutheeJ.A., HowellD., and BallsM. (1990). An RSPCA/FRAME survey of the use of non-human primates as laboratory animals in Great Britain, 1984–1988.ATLA17, 335–400.
4.
JackD. (1990). Issues of ‘animal pain and human gain’. Letter in The Independent on 14 May 1990.