Have custom font, loaded it to my library. How do I call it?

I know how to call a font from a URL
@font-face {
font-family: myFirstFont;
src: url(https://fonts.gstatic.com/s/tangerine/v11/IurY6Y5j_oScZZow4VOxCZZM.woff2);
}
div {
font-family: myFirstFont;
}

But how to I reference a file in my Qualtrics Library?
Any ideas?
Marty