By Banyard, P.J.
By Downes, P.J., Griffith, E.A., Chalaud, F.
By Johnstone, P.J.
By O'Rourke, P. J., P.J.
By Hawton, Keith, Cowen, P.J.
By Anderson, Lynch, P.J.
By Dunbar, Joyce, Lynch, P.J., P. J.
By Atkinson, Lawrence V., Harley, P.J.
By Charles Windridge, P.J. Kenway, Windridge, Charles, Kenway, P.J.
By Lemstra, P.J., Kleintjens, L.A.
By Holt, P.J.
By Graedel, Thomas, Crutzen, P.J.
By Riley, Patrick A., Cunningham, P.J., Forsythe, Elizabeth, Bromham, David
By Downes, P.J., Griffith, E.A.
By Harari, P.J., Ominsky, Dave
By Robinson, P.J.
By Corfield, P.J.
By Beswick, C., Downes, P.J.
By Reay, P.J.
By Fry, P.J., Schools Council, Bainbridge, Brian W., Holt, G., Schools Council Educational Use of Living Organisms Project
By Hest, Amy, Lynch, P. J., P.J.
By R. Brocklehurst, P.J. Mawby, M. B. V. Roberts, Brocklehurst, R., Mawby, P.J., Roberts, M. B. V.
By Marsh, John S., Swanney, Pamela J., Swannery, P.J.
By Brown, P.J., Forsyth, John Bruce
By McHugh, P.J.
By Du Plessis, P.J., Bothma, N., Jordaan, Y., Van Heerden, N.