Music paper

The Sheet Music Books are items that you can bring to Agatha.

Locations
One can be found in the Springvale School. Enter The school through the front entrance, from there turn right and you'll enter a class room with a few stacks of desks, and a couple of beds. Head to ther fliped over teachers' desk. it should be right on the ground behind it, but it may take a few seconds of looking.

There is also one in Vault 92, in the Living Quarters. It is in the bathroom of the men's quarters. Inside the closed bathroom stall. Behind the toilet.

Another book can be found on the roof of the Statesman Hotel, in the corner. Near the music stands and chairs.

Another can be found in the children's section of the Arlington Library. Past the Firehose Box. Go right. Past the Nuka Cola Machine. In the first room you see enter. In the right cubicle by a music stand on the floor.

Yet another can be found in The National Archives (if i remember correctly the first room in the Archive Sub-Basement)

One can be found in Roosevelt Academy in the Arts and Athletics hall on the stage near the music stands.