Indigo Dye Pits at Zaria - UWDC - UW-Madison Libraries

Efficient bioremediation of indigo-dye contaminated textile wastewater using native microorganisms and combined bioaumentation-biostimulation techniques - ScienceDirect

The Hidden Histories of Indigo – the thread

Books - African Studies Portal - UW-Madison Libraries - Research Guides at University of Wisconsin-Madison

DermaRite Industries 00262E - McKesson Medical-Surgical

Indigo dye india hi-res stock photography and images - Alamy

Books - African Studies Portal - UW-Madison Libraries - Research Guides at University of Wisconsin-Madison

Indigo and Rust Seattle Artist League

Indigo Natural Dye: Experiments and Results

Natural Dye Jaspe Wall Hanging in Indigo Textile Art Home Decor Handmade in Guatemala by Mayan Hands