Pisa torn
1) http://www.italyholidayhomes.com/images/photos/PisaTower_Lg.jpg (15.05.11)
2) http://www.handprint.com/HP/WCL/IMG/LPR/pisa.gif (15.05.11)
3 )Matve, Hubert.1982. Tornid läbi aegade.Tallinn:"Valgus" 18-20.
4) Wild F., Belford R., Boulton S., Catling. C., Cole S., Duncan P., Ercoli O., Gumbel
A., Jepson T., McDonalds F., Shaw J. 1996. Silmaringi reisijuht, Itaalia. Suurbritannia.
Dorling Kindersley Limited.316.
5) http://www.endex.com/gf/buildings/ltpisa/ltpnews/sef0494/pisa10.gif (15.05.11)
6) http://blog.arounder.com/wp-content/uploads/2010/03/Screen-shot-2010-03-02-at-
12.00.36-PM-300x156.png (15.05.11)
7) http://joetourist.ca/italy/images/Pisa/2006IMG_3121a.jpg (15.05.11)
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annaabi.ee 
