Did you know? Mass of Double Bass (10 kg) is about as big as Mass of Tuba (10 kg)
Pop. of Riyadh, Saudi Arabia (5.68 million people)
/fact/population-of-riyadh-saudi-arabia
Link
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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