years, class (top)
Marietta College is one of 10 member institutions. Spell out on first reference.

years, alumni class designation (top)
No comma before or after the year, but include a space between the name and the year. (Ex: "John Doe '89 is the new administrator.")

years, series (top)
Print the words the reader should be reading, such as "from," "to," "between," and "and." (Ex: "The students have enjoyed Doo Dah Day from 1978 to 2006.") In other uses, such as headlines and lists, use all four digits followed by a hyphen, plus just two digits if the century remains the same. (Ex: 1960-71; 1994-2001; 2005-06 school year)

years, plural (top)
1970s or the '70s (no possessive apostrophe).

Glossary for this Letter

• years, class

• years, alumni class designation

• years, series

• years, plural