Today, I am grateful for @internetarchive and all online archives, and the institutions that doggedly do the tedious and often thankless work of making them go. Like @SLUBDresden & @arthistoricum who digitized and host the seminal German design magazine Gebrauchsgraphik (which was once available only at IADDB, a site currently offline due to a rebuild): https://www.arthistoricum.net/werkansicht/dlf/112648/1
Here are rock solid snippets from just the first issue in 1924.
@SLUBDresden also digitized Das Plakat, Typographische Mitteilungen, and a bunch of other art and design books: https://www.arthistoricum.net/en/themen/textquellen/gebrauchs-und-reklamegrafik