Don't feel singled out. Much of the literature of the last few decades is wrong on this.

Goodrich (1930) may have been the first to give the name Tetrapoda a rank (that of superclass). He was not, however, the first to use the taxon name, which was already fairly popular. Most uses before 1930 are informal "tetrapods" (in various languages), but formal ones did occur (and I don't mean the homonyms e.g. for squamates that haven't lost any limbs, Haworth 1825 if I remember that right). A few years ago I spent a few hours in Google trying to find the first use. The oldest I found was by Haeckel (can't remember if 1860 or 1866)... who attributed it to Aristotle; that was common at the time, because the legal fiction that zoological nomenclature began in 1758 had not yet taken hold.

Anyway, at least as long as you're using the name rankless, there is no reason to ascribe Tetrapoda to Goodrich (1930), a book that used the name wholly without claiming that it was new.