- Listenly
- Public Library
- Project Gutenberg
- Organic compounds — Synthesis
Organic compounds — Synthesis — Audiobooks
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives
by Yü-Gwan Chen
Meta Toluene Sulphonic Acid and Related Compounds
by C. F. H. (Charles Francis Hitchcock) Allen