1. Losses of F-11 during the production of PUR foams;BASF,1981
2. Action of Freons and halocarbons on the ozone layer of the atmosphere and on the climate;Borisenkov;Tr. GL. Geofiz Obs.,1980
3. Accelerated Aging of Rigid Polyurethane Foam
4. 1980 world production and sales of fluorocarbons FC-11 and FC-12;CMA,1981
5. World production and release of chlorofluorocarbons 11 and 12 through 1980;CMA,1981