Price: Printed Copy A07 Microfiche AOI Codes are used for pricing all publicati0ns. The code is determined by the number of pages in the publication. Information pertaining to the pricing codes can be fonnrl in tht> r11rrt>nt i~~~~ .. ~ nf thr;> following publications, which are generally available in most libraries: Energy Research Abstracts (ERA); Government Reports Announcements and Index