Nouns without Formative Suffixes (Root-Nouns)
Karl Brugmann · 1891
Nouns without Formative Suffixes (Root-Nouns) was published in Volume II/1 Morphology (Stem-Formation and Inflexion). Part I. Introduction. Noun Compounds. Reduplicated Nouns. Formative Suffixes, Root-Nouns on page 478.