Volume II of the Book Catalog consists of Part 1, the Author Index, and Part 2, the Subject Index. The Author Index lists each author in alphabetical order. Indented beneath each name, alphabetically, appear the titles of the works of each author, followed by the call number for each title, in italics. The Subject Index lists, in alphabetical order, the subject headings assigned to the books in the catalog. Indented beneath each subject, alphabetically, appear the titles associated with it, followed by the call number, in italics, for each title. The complete entry for items listed in the Author or Subject Indexes may be obtained by consulting the full catalog, where the appropriate title will be listed alphabetically. The holding libraries may be identified by referring to the List of EPA Libraries.