| title | ISBN-13 | year of publication |
|---|---|---|
| Discovering cycles, | 978-0-07-006165-1 | 1973 |
| Discovering Plants, | 978-0-07-006161-3 | 1966 |
| Elementary School Science and How to Teach It | 978-0-03-062866-5 | 1984 |
| Elementary school science and how to teach it | 978-0-03-022721-9 | 1979 |
| Elementary school science and how to teach it | 978-0-03-091539-0 | 1974 |
| Elementary school science and how to teach it | 978-0-03-069890-3 | 1969 |
G.B. · G.O. · G. O. Blough · Glenn Blough · Glenn O. Blough