Multivariable System Identification for Process Control by Y Zhu

Robust Multivariable Feedback Control by Jan Lunze (1988, Hardcover)

Controlling Multivariable Processes

Multivariable Calculus, Linear Algebra, and Differential Equations

Exercises in Multivariable and Vector Calculus by Caspar Curjel, Very Good Cond.

Wang - PID Control for Multivariable Processes - New paperback or soft - X555z

Thomas' Calculus, Multivariable

Student Solutions Manual (Chapters 8-13) for Stewart's Multivariable Calculus: