Contained in a binder (30 cm.) with separately published user's guide (36 p.) and eye-readable contents-guides on microfiches.
"This second phase of the National tune index (NTI/2) is a computer-generated seven-part index of 20,733 citations taken from 1,077 pieces of sheet music and 298 collections found in the United States, Canada, United Kingdom, Ireland, Germany, Belgium, Sweden, and France"--User's guide, p. 5.