Psalms and who they're attributed to. (at the beginning of the Psalm it says:)

David - Psalms 3-9, 11-32, 34-41, 51-65, 68-70, 86, 101, 103, 108-110, 122, 124, 131, 133, 138-145

the Sons of Korah - 42, 44-49, 84-85, 87-88

Asaph - 50, 73-83

Solomon - 72, 127

Heman the Ezrahite - 88

Ethan the Ezrahite - 89

Moses - 90