It is a mineral that find in the mountains
Frank Perls died in 1975.
Frank Perls was born in 1910.
Nick Perls was born in 1942.
Nick Perls died in 1987.
Laura Perls was born in 1905.
Laura Perls died in 1990.
Klaus Perls died in 2008.
Klaus Perls was born in 1912.
Hugo Perls was born in 1886.
Hugo Perls died in 1977.
a test for hemosiderin, utilizing Perls Prussian blue stain.
Alexander Perls was born on 1976-05-11.