The Library is mindful of its role as an archival collection for the social sciences. Where the principles set out above cannot be met through the acquisition of materials in electronic format alone, a copy in print format will be acquired. The Library collects significant material in the social sciences on a worldwide basis, paying particular attention to the integrated and interdisciplinary approach of the School. The interdisciplinary nature of the social sciences and its publications means that the boundaries of any particular subject or discipline cannot be easily determined and described in isolation. For the purpose of collection development, a 'core area' of specialisation within the social sciences is defined for intensive collection.