期刊属非再版文献,年度发行量基本固定,印数与订户大体一致,逾期补缺困难。造成期刊缺期少卷大致有以下几种情况:一是出版单位漏寄;二是邮局错投;三是中途改变发行渠道;四是漏订;五是因经费等原因中途停订;六是阅览破损或丢失。对前四种情况要加强期刊记到管理,及时发现,及时催询和补购。第五种情况造成的缺期是连贯的,补 Periodicals are non-reprinted documents, the annual circulation is basically fixed, the number of prints is generally consistent with that of subscribers, and it is difficult to fill them overdue. Resulting in the lack of periodical lack of volume generally have the following situations: First, publishing units missed the second postoffice wrong vote; Third, midway change distribution channels; Fourth, missed set; Fifth due to funding and other reasons, stop; sixth Reading broken or missing. On the first four cases to strengthen the journal credited to management, timely detection, prompt reminders and replenishment. The fifth situation caused by the lack of continuity, make up