----------------------------Original message---------------------------- Hi! Thanks to all of the people who responded - I especially appreciated comments from actual map users. Everyone's opinions were very useful. Just one other comment, our preservation librarian commented that the thickness of materials to be placed in the back of a book should be no more of an 1/8th of an inch when folded (so there is not too much stress on the binding) - and if the thickness is greater than an 1/8th of an inch then a separate portfolio should be created (if there isn't one already) for the maps. The option is that you could either create a portfolio for the additional maps, keep the additional maps in the map collection, keep all maps in the map collection, or keep maps that fit into the back of the book on the shelf and for those sets that are too thick/large keep them in the map collection. I think in the case of sets of maps with books, that the sets should be kept together - either on the shelf or in the stacks - after reading everyone's comments I feel keeping the map(s) in the map collection is probably the best option, although I can see the pros and cons of all the options. Well, that was a rather longwinded thank you! Wendy +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Wendy S. Mann Government Documents/Electronic Resources Librarian University of Pittsburgh 207 Hillman Library (412)648-7726 Pittsburgh, PA 15260 e-mail: [log in to unmask] +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++