United States. War Department, Dictionary of Spoken Russian — §26… (1945)
“ Most irregular verbs are peculiar only in that the inf stem and the pr stem do not match. Thus, держать "to hold" has the pr forms as of Class Four: держу, держит; the dictionary, by showing these forms, tells the whole story: imv держи, p держал, ppp подержанный. Similarly, чуять "to scent" has the pr stem [čuy-] : чую, чует ”
