Proto, F.: 21 Modern Etudes (Bass)

Nelson, S: Technitunes, Pupil's Book (Double Bass)

Vance: Progressive Repertoire for the Double Bass, Vol.2 (bass)(audio access) Carl Fischer

Applebaum: Building Technic with Beautiful Music, Vol.3 (bass) Belwin Mills Publishing

Tordini, Chris: Killer Technique- upright bass

Muller, J.F. & Rusch, H.W.: String Method, Bk.4 (bass)

Etling, F.R.: Workbook for Strings, Bk.1 (bass)

Kreutzer, R. (Simandl-Zimmerman): 18 Studies (bass)

Rhoda, Janet Tucker: Complete Technique for Double Bass, Bk. 1

Anderson & Frost: All for Strings, Bk.3 (bass)

Montag, Lajos: Double Bass Method, Vol.1

Applebaum, Samuel: Building Technic with Beautiful Music Bk.2 (bass)

Rollez: Double-bass Method - The Virtuoso Bassist, Vol.3, Advanced Level (bass) Gerard Billaudot