Because abstracts are extracted from a paper and used separately, one should not use the first person, display mathematics, nor use citation reference numbers. On a line below the abstract please include six key words for indexing and database word searches. Underline the heading and start the text on the next line. For third-level headings, only the first letter should be a capital. Underline, then begin text after three spaces.
Limit figures to one per page.
In addition, please indicate where the typesetter should position artwork by marking and circling the first call-out to each figure in the manuscript margin. Please include a separate sheet containing a list of figure captions which should be substantively one or two sentences. Captions will be set in type by the typesetter. The original figures and one copy should be sent when the article is accepted. Figures submitted must be of a high enough standard for direct reproduction, with clear, sharp, black lines on a white background.