several books classic electro-hydraulic servo control

Recommended several books classic electro-hydraulic servo control,Thanks a lot!

For basic stuff my design guide is good.
If you want to get into very technical calculations then
goodreads.com/author/show/18 … _J_Viersma
The book is rare and the price is high.

A cheaper place to look is
hydraulicspneumatics.com/bookstore-1
The George Keller book is good. The examples are old but the physics and math are still valid.
Most of the Jack Johnson books have about the same material in them.
Jack Johnson has some good books but don’t get the one on Basic Electronics.