1937
Bibliografía (21 obras)
Twidders
2011
The Adolescent Armageddon
2002
Can you find us?
2001
Flowers and friends
If grass could talk
Insect detector
Who dug this hole?
We Can Read About Nature
Where Robins Fly, and Why
2000
We Can Read about Nature Set
How Flowers Bloom
Of Tithes and Testimonies
1996
I can save the earth
1993
Flowers for you
Pierced and Pretty
1984
The 100-year-old cactus
1983
Cactus
1982
Cactus, the all-American plant
Making dolls for pleasure & profit
1976
Plant fun: ten easy plants to grow indoors
1974
Sharing the earth
1971
