[…] the domain of each element, or each relation among elements, is indicated when the element in question is set up. If many of these domains appear to be equivalent, as is frequently the case, that fact may then be noted and we may define a domain such as WORD or the like.
- Harris (1951), a pag.15, n.15

We now break utterances into parts such that stress position is penultimate in each of these parts (such parts will turn out to be ‘words’ in the morphology).
- Harris (1951), a pag.119

Every word has precisely one main stress, and occurs occasionally by itself as a complete utterance. No word is divisible into smaller sections each of which occurs by itself (except in special circumstances) as a complete utterance.
- Harris (1951), a pag.327