Open your Windows to Learn : OWL : Tanulj nyitott ablakokkal! - mondja OWL a Bagoly
   

Semmelweis in book

Bagolyfotó - OWL's photo:

My photo in the book of Prof.S. Momoshima, Japan: Penicillin was born out of sneezing
   
Teljes képernyő - F11 - Full screen