Related Clues:

• 52-wk. units
• Parts of some library call nos
• 19-Across units: Abbr
• 1520 and 2015, e.g.: Abbr
• Timeline parts: Abbr
• Sch. units
• Long time: Abbr
• '01 and '10, e.g
• Academic pds
• Anniversary no
• Sentence pts
• Vbs. and adjs
• Freshman and sr
• History book nos
• Timeline divs