| River Study - sampling | ||
| | Back | | ||
| Barcelona Field Studies Centre | ||
| http://geographyfieldwork.com/Sampling.htm | ||
| Geographical Association | ||
| http://www.geographyteachingtoday.org.uk/fieldwork/resource/fieldwork-techniques/sampling-techniques/ | ||
| WJEC Geography | ||
| http://www.wjec.co.uk/uploads/publications/7731.pdf | ||