'The elements erbium, terbium, ytterbium & yttrium are named for the town of Ytterby in this country'
Sweden
SCIENCE & NATURE: The elements erbium, terbium, ytterbium & yttrium are named for the town of Ytterby in this country
The elements erbium, terbium, ytterbium & yttrium are named for the town of Ytterby in this country
The elements erbium, terbium, ytterbium & yttrium are named for the town of Ytterby in this country
SCIENCE & NATURE
Sweden
SCIENCE & NATURE