@inbook{0e9889244004491f99f16864ea0d44b9,
title = "A procedure for the digestion of natural water samples for determination of total N and total P concentrations in freshwaters",
author = "Johnes, \{Penny J\} and A. Heathwaite",
year = "1993",
language = "English",
volume = "135",
editor = "J. Cape and J. Hilton and Kennedy, \{V. H.\} and Rowland, \{A. \}",
booktitle = "Chemical analysis of natural waters in environmental research : a collection of papers presented at an International Conference on Chemical Analysis of Natural Waters in Environmental Research: analytical solutions of current problems, held at the Institute Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria, UK, September 1991",
edition = "1-3",
}