Studies Saxophone | Voxman Selected
The most famous piece in that book is (often called the "Ferling Etude" or "48 Famous Studies" No. 1). It's a slow, lyrical study in C minor.
The piece you're likely referring to is from (published by Rubank/Hal Leonard). This book is a compilation of etudes originally written for oboe (by Ferling, et al.), adapted for saxophone. voxman selected studies saxophone