By Holt, Robert B.
By Holt, Oliver
By Fry, P.J., Schools Council, Bainbridge, Brian W., Holt, G., Schools Council Educational Use of Living Organisms Project
By Holt, Julia, Woodcock, Sandra
By Holt, Nick
By Holt, Julia
By Holt, Nick, Laverne, Lauren
By Holt, Nick, Various
By Holt, Elizabeth, Perham, Molly, Molly Perham, Ross
By Ridout, Ronald, Holt, Michael, Miller, Jon
By Holt, Geraldene
By Lamb, Max, Abake, Holt, Gemma, King, Emily, Dunning, Robert Andrew
By Holt, Allan St John
By Holt, Tom
By Holt, Vincent M., Mound, L. A.
By Schor, Juliet, Holt, Douglas B.
By Tom Holt, Holt, Tom
By Holt, P. M.
By Holt, J. C., Reeves, Marjorie
By Brennan, Georgeanne, Holt, Geraldine
By Holt, Debby