Richard Helmer
2 published titles
Surveillance of drinking water quality in rural areas
(Contributor)
1 edition
- ISBN: 0582063302
- Longman Scientific & technical on behalf of the World Health Organisation and the United Nations Env
- 1991
- Details
Water pollution control : a guide to the use of water quality management principles
(Contributor)
1 edition
- ISBN: 0419229108
- E & FN Spon
- 1997
- Details
