brew install nedap/versions/<formula>
Or brew tap nedap/versions and then brew install <formula>.
Example, to install the latest version of gettext 0.20:
brew install nedap/versions/gettext@0.20.2
Example, to install version 72 of Chromedriver which is needed for the Ons Administration Cucumbers
brew install --casks nedap/versions/chromedriver
brew help, man brew or check Homebrew's documentation.