@book{112812,
	author = {Ressler, Stephen and Teaching Company},
	title = {Understanding the world's greatest structures : },
	publisher = {The Teaching Company,},
	year = {2011.},
	series = {The Great courses},
	address = {Chantilly, Virginia :},
	note = {Course no. 1153.
24 lectures, 30 minutes per lecture.}
}