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Shapp, Martha's books list

No.	Title	Publish Year
1.	Let's find out what's big and what's small	1955
2.	Let's find out what's in the sky	1961
3.	Let's find out about the moon	1965
4.	Let's find out what electricity does	1961
5.	Let's find out about the United Nations	1962
6.	Let's find out about the sun	1965
7.	Let's find out what's light and what's heavy	1961
8.	Let's find out about spring	1963
9.	Let's find out about wheels	1962
10.	Let's find out about houses	1962
11.	Let's find out about Abraham Lincoln	1965
12.	Let's find out about safety	1964
13.	Let's find out about air	1963
14.	Let's find out about winter	1963
15.	Let's find out about fishes	1965
16.	Let's find out about summer	1963