A. Morgan

Improved methods of estimating root length using a photocopier, a light box and a bar code reader

Peter J. Gregory, B. Lancashire, H. Rowse, 1987, Plant and Soil.

Electronically monitored feeding behaviour of the lettuce root aphid (Pemphigus bursarius) on resistant and susceptible lettuce varieties

R. Cole, A. Morgan, W. Riggall, 1993 .