illustrate with the following book:
music in America, 1801-1925
Wolfe, Richard J.
first line of the call number, 781.97,
represents the subject of the book and each number has a
first number, 7, puts the book in the 700s
which is Fine Arts.
the second number, 8, puts the book in
the 780s which is music.
remaining numbers on the first line represent the sub-division
the first line as a whole number with a decimal number.
second line, beginning with the first letter of the author’s
last name, identifies the author.