Here are call numbers that will show you good areas to browse for
double bass music. The UNT Libraries use the Library of Congress
system to classify our collections. Classifying puts like things together
on the shelves. Call numbers beginning with M stand for music scores.  

M55-M58  solo double bass

M237-M238  double bass and piano

M290-M295  duets

M349-M353  string trios

M1018  double bass concertos, full score

M1019  double bass concertos, piano reduction

M1118  double bass concertos with string orchestra