Worldwide concern in scientific, industrial, and governmental com­ munities over traces of toxic chemicals in foodstuffs and in both abiotic and biotic environments has justified the present triumvirate of specialized publications in this field: comprehensive reviews, rapidly published progress reports, and archival documentations. These three publications are integrated and scheduled to provide in international communication the coherency essential for nonduplicative and current progress in a field as dynamic and complex as environmental contamination and toxicology. Until now there has been no journal or other publication series reserved exclusively for the diversified literature on "toxic" chemicals in our foods, our feeds, our geographical surroundings, our domestic animals, our wild­ life, and ourselves. Around the world immense efforts and many talents have been mobilized to technical and other evaluations of natures, locales, magnitudes, fates, and toxicology of the persisting residues of these chemicals loosed upon the world. Among the sequelae of this broad new emphasis has been an inescapable need for an articulated set of authorita­ tive publications where one could expect to find the latest important world literature produced by this emerging area of science together with documentation of pertinent ancillary legislation.

Worker reentry safety. I. An overview of the reentry problem on citrus in California.- Worker reentry safety. II. The viewpoint and program of the National Institute for Occupational Safety and Health.- Worker reentry safety. III. Viewpoint and program of the Environmental Protection Agency.- Worker reentry safety. IV. The position of the California Department of Food and Agriculture on pesticide reentry safety intervals.- Worker reentry safety. V. Reentry intervals as health standards.- Worker reentry safety. VI. Occupational health aspects of exposure to pesticide residues.- Worker reentry safety. VII. A medical overview of reentry periods and the use of urinary alkylophosphates in human pesticide monitoring.- Worker reentry safety. VIII. The determination of urinary metabolites-An index of human and animal exposure to nonpersistent pesticides.- Worker reentry safety. IX. Techniques of determining safe reentry intervals for organophosphate-treated cotton fields.- Selenium in the environment.- Diquat and endothall: Their fates in the environment.