Tina
Tartu KHK
Tina
Referaat
Koostas: Ingrit Pavlov
Juhendas:
Tartu KHK2009
Sisukord
Tina ................................................................................................3
Kui kaua tunneb inimkond tina.......................................................4
Tina algne tootmine ja avastamine.................................................4
Tinakatk..........................................................................................5
Tina radioaktiivsus.......................................
annaabi.ee 
