TY  - JOUR 
T1  - The shadows cast by buildings and towers in cities and by montains in the countryside
JO  - Revista Brasileira de Ensino de Física
A1  - Moreira, João Luiz Kohl
SN  - 1806-1117
UL  - 10.1590/S1806-11172003000100008
VL  - 25 
Y1  - 2003
PB  - Brasil 
ER  -