Items with a Q prefix in the call number are more than 28cm tall or more than 25cm wide(the Q stands for quartile).  The Funk ACES Library does not shelve these items separately--they are interfiled with books of 'normal' size. 

When looking for an item with a call number that begins with Q., ignore the Q. and look for the numbers following it. For example, you will find  Q. 712.0973 P939 shelved at 712.0973 P939.