Humanist 521 family (Bitstream library) contains 11 fonts.
Humanist 521 Std Light
Humanist 521 Std Light Italic
Humanist 521 Std Roman
Humanist 521 Std Italic
Humanist 521 Std Bold
Humanist 521 Std Bold Italic
Humanist 521 Std Extra Bold
Humanist 521 Std Ultra Bold
Humanist 521 Std Condensed
Humanist 521 Std Bold Condensed
Humanist 521 Std Extra Bold Condensed
Font collection on Fonts-online.com Alphabet font list
