[…] it is usually necessary to consider not a simply localized substitution, like 'the' for 'a' in 'You’ve lost ( ) job', but a more diffuse substitution, on the order of '–ose are … -s' for '–is is …0' in 'Th( ) my book ( ): Those are my books' as compared with 'This is my book'. We will therefore call these morphemically analyzed categories COMPONENTS.
- Harris (1948), Pag. 87

It can be shown that they [components] are identical in analytic status with all other morphemic ‘long components’, which can be set up for morphology in much the same way that phonemic long components are set up for phonology.
- Harris (1948), Pag. 87, n.1