Looking at the World, Etc. (General Editor: R.J. Unstead. Pt. 4 Written in Association with G.M. Ashby. Second Edition.) [With Illustrations.].
Looking at the World. (General Editor: R. J. Unstead.-Part 4 was Written in Association with G. M. Ashby.- Fourth Edition.).
Looking at the World, Etc. (General Editor: R.J. Unstead. Part 4 Written in Association with G.M. Ashby. Third Edition.) [With Illustrations and Maps.].
Looking at Geography. Pt. 1-4. Looking at the World, Etc. (General Editor: R.J. Unstead.-Pt. 4 Written in Association with G.M. Ashby.) With Plates and Maps.