Tim Halliday

Trees (Clue Books)

By Gwen Allen John Denslow, Joan Denslow, Tim Halliday

The Encyclopaedia of Reptiles and Insects

By Tim Halliday, Dr. Kraig Adler, Christopher O' Toole

The Encyclopaedia of Reptiles and Amphibians (Unwin Animal Library)

By Tim Halliday, Kraig Alder

Water and Health in an Overcrowded World

By Tim Halliday, Basiro Davey

Evolving Infections

By M. Gillman, Tim Halliday

The New Encyclopedia of Reptiles and Amphibians

By Tim Halliday, Kraig Adler