Related Clues:
- Reference with a world of information?
- Reference with maps
- "___ Shrugged"
- Activate, as an alarm
- Sound check
- Traveler's purchase
- Atlas component
- Word after beta or acid
- Book with Brazil and Bhutan
- Litmus ___
- Lab act
- It's often taken in silence
- Big reference book
- Grade determiner, often
- Mini-section of an almanac