Appropriate Technology for Water Supply and Sanitation: A Planner's Guide (co-authored with John Kalbermatten, DeAnne Julius and Charles Gunnerson). Washington, DC: The World Bank, 1980.

Appropriate Technology for Water Supply and Sanitation: Health Aspects of Excreta and Sullage Management (co-authored with Richard Feachem, David Bradley and Hemda Garelick). Washington, DC: The World Bank, 1980.

Ventilated Improved Pit Latrines: Recent Developments in Zimbabwe (co-authored with P. R. Morgan). World Bank Technical Paper No. 3. Washington, DC: The World Bank, 1982.

Pit Latrine Ventilation: Field Investigation Methodology (co-authored with Beverley Ryan). TAG Technical Note No. 4. Washington, DC: The World Bank, 1983.

Ventilated Improved Pit Latrines: Vent Pipe Design Guidelines (co-authored with Beverley Ryan). TAG Technical Note No. 6. Washington, DC: The World Bank, 1983.

Ventilated Improved Pit Latrines: Zimbabwean Brick Designs (co-authored with Peter Morgan). TAG Discussion Paper No. 1.  Washington, DC:  The World Bank, 1985.

The Design of Pour-flush Latrines.  TAG Technical Note No. 15.  Washington, DC:  The World Bank, 1985

The Design of Small-bore Sewers [i.e., settled sewerage] (co-authored with Richard Otis). TAG Technical Note No. 14.  Washington, DC:  The World Bank, 1985. 

Ventilated Improved Pit Latrines: Guidelines for the Selection of Design Options. TAG Discussion Paper No. 4. Washington, DC: World Bank, 1985.

Note: The full list of TAG Technical Notes available in pdf format is given here.