Do not give the same information in tables and figures. Line drawings should be submitted as three sets of clear glossy or original laser prints, with lettering of high standard and large enough to be legible when reduced. For halftones with critical fine detail, an overlay should be provided showing which area of the photograph requires greatest definition. On the back of each figure affix a label giving the figure number and authors' names, and indicate the top of the figure with an arrow. Explain all symbols used in the figure.
References are to be numbered in order of citation and cited in the text by number.
The reference section should be typed double-spaced at the end of the text, following the sample formats given below. All single word journal titles should be spelled out. Sample references are given below for a journal article, a book, and a chapter in a book. Viral infections of the nervous system. Journal title abbreviations should follow the practices of Index Medicus.