Horizon Information Portal

	Series	Count
1.	How the US government works	4
2.	How the world works	1
3.	How the world works (Sirius Publishing)	2
4.	How they lived	2
5.	How they lived in Canada	2
6.	How things are made	6
7.	See Also Snyder, Inez. How things are made	6
8.	How things grow	0
9.	See Kottke, Jan. How things grow	6
10.	How things work (Children's Press (New York, N.Y.))	0
11.	See Mattern, Joanne, 1963- How things work	7
12.	How things work (Lake Forest (Orange County, Calif.))	0
13.	See Claybourne, Anna. Science in action. How things work	4
14.	How things work (New York, N.Y.)	4