link to Kathleen Sperling’s thread on twitter, who designed my Daughter’s Vest.
Studio Miranda has an extremely thoughtful blog post about yarn choices.
She covers books, websites and people who can help with yarn substitutions, the nature of yarn support (designers have to market the yarn they are given, so they can’t help with yarn substitution on their patterns), and finally, how to make Instagram more of a community, and less of an insecurity market.
Media Peruana covers things to think about in yarn substitution with links to helpful sites.