| Sulfur - Its Physical States And Properties |
1971 |
ENCYCLOPEDIA BRITANNICA EDUCATIONAL CORP |
9 min |
16mm |
|
sound |
| Preparation of oxygen.: seven demonstrations ▶ |
1970 |
Encyclopaedia Britannica Educational Corporation |
15 min |
16mm |
|
sound |
| Preparation Of Oxygen - Seven Demonstrations |
1971 |
ENCYCLOPEDIA BRITANNICA EDUCATIONAL CORP |
15 min |
16mm |
|
sound |
| Patterns Of Scientific Investigation |
1971 |
ENCYCLOPEDIA BRITANNICA EDUCATIONAL CORP |
22 min |
16mm |
|
sound |
| Crookes Tubes |
1971 |
ENCYCLOPEDIA BRITANNICA EDUCATIONAL CORP |
9 min |
16mm |
|
sound |