TY  - BOOK
ED  - Educational Foundation for Visual Aids, London
TI  - Properties of matter ( motion picture): plastics and rubbers 
PY  - 1967///
CY  - London
PB  - Educational Foundation for Visual Aids
KW  - Matter
KW  - Properties
N1  - Backup available in VHS 1/2 in; Summary: Sir Lawrence first compares naturally and artificially produced plastics and describes their structure. The constitution of rubber is desribed, it natue being illustrated experimentally and with models
ER  -