Encyclopedia of Library and Information Science edited by Allen Kent and Harold Lancour, and published by Marcel Dekker, is a 35 - volume set with:
1
31 - volume main encyclopaedia and 4 - volume index
2
32 - volume main encyclopaedia and 3 - volume index
3
30 - volume main encyclopaedia and 5 - volume index
4
33 - volume main encyclopaedia and 2 - volume index