Give first and last page numbers. Do not cite among the references abstracts presented at meetings, personal communications, manuscripts submitted and not yet accepted, unpublished observations, or any other material that is not retrievable. Tables Type each table on a separate sheet in double spacing. Number the tables in roman numerals and give each one a full title without abbreviations so that the reader does not have to go back to the text to make sense of the table. Make sure that each table is referred to by number in the text.
Figures Send three copies of all artwork.
Photographs of operative specimens should include a cm rule. Use only standard abbreviations. Illustrations in colour must be paid for by the author. Send transparencies and two positive colour prints. Do not use the sign.