| Type |  Visual |
| ชื่อเรื่อง | Shapes and polarities of moleculars [videorecording] / Chemical Education Material Study ; produced by Norman Wright Productions in association with Natural Science Films ; director, J.A. Canpbell ; producer, David W. Ridgway ; animation by G.M. Nevius Company |
| พิมพลักษณ์ | Rochester, N.Y. : Ward's Natural Science, c1989 |
| รูปเล่ม | 1 videocassette (20 min.) : sd., col. ; 1/2 in. + 1 teacher's guide |
| หัวเรื่อง | Molecular struture |
| | Molecules |
| | Polarity (Biology) |