TY  - BOOK
AU  - Orr, Tamra B.
TI  - How did they build that? Lighthouse
SN  - 9781610801140
U1  - 387.155 
PY  - 2010///
CY  - United States of America
PB  - Cherry Lake Publishing
KW  - Lighthouses
N1  - index
N2  - Describes how lighthouses were built in the past, their different types, what the lighthouse keeper did, and the ways in which they have been replaced today by computers
ER  -