Contributions must be in English, written clearly and concisely and should be intelligible to a non-specialist. Non-standard abbreviations must be written in full when first used. Accepted papers will be edited to ensure stylistic conformity, clarity, and conciseness. Details of results presented in this way should not be repeated in the text. Photographs should be well contrasted black and white glossy prints, unmounted.
Coloured illustrations are welcome, but can be included only at the author's expense.
Line drawings, maps and graphs should be in black ink on tracing paper, white paper or pale blue lined graph paper. All lettering, numerals etc., for Figures should be suitable for reproduction and large enough to withstand reduction. Particular care must be taken in the case of diagrams produced as computer print-out. Please give references for statistical methods with which readers may not be familiar. When comparing results, the confidence interval for the difference should be given.