f7723559_CSS_HTML_XHTML_Reference_Book__Description_and_notes
[Property/Values] font if desired, any combination of the values for font-style, font-variant and font-weight followed by the required font-size, an optional value for line-height and the also required font-family, or use inherit [Description and notes] 
for setting at least the font family and size, and optionally the style, variant, weight, and line-height of text initial value depends on individual properties; inherited; percentages allowed for values of font-size and line-height
CSS HTML XHTML Reference Book
Description and notes