| Title | The Indispensable |
| Alternative title | Nine Progressive Exercises for the Guitar followed by Three Studies for Advanced Performers |
| Creators | Leonard Schultz (composer) |
| Opus | Op.40 |
| Instrumentation | guitar |
| Number of movements | — |
| Keys | — |
| Composed | — |
| First published | 1840 |
| Dedication | — |
| Tempo markings | — |
| Metronome markings | — |
| Time signatures | — |
| Average duration (sec) | — |
| Number of measures | — |
| Composition types | Exercises |
| Period | Romantic |
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| Code |
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| Details | Section | Type | Publisher | Date | File (click to view) |
|---|---|---|---|---|---|
| view | Complete | — | Manuscript | 1840 | Complete Score |
| view | Complete | — | Schott | 1927 | Complete Score |
| view | Complete | — | — | — | 1. Etude 1. Etude (tablature) 2. Etude 2. Etude (tablature) |
| view | Complete | — | — | — | 3. Etude 3. Etude (tablature) |
©2026 David P. Anderson