NLM is the world’s largest biomedical and health research library and maintains a pre-eminent collection of literature and materials including, but not limited to print monograph and serial volumes, manuscripts, pamphlets, theses, audiovisuals, and visual materials including fine prints, photographs, posters, and ephemera. Subject knowledge and experience using a variety of complex conservation treatments including but not limited to solvents treatments, stain reduction, adhesive removal, loss compensation, mending tears and voids, and flattening of paper collections.