How does the right level of public supplies get determined - for everything from salt to cope with ice to vaccines for influenza? Lisa Jardine investigates how this challenge is met.
Discover 11,128,835 listings and 279,577 playable programmes from the BBC
How does the right level of public supplies get determined - for everything from salt to cope with ice to vaccines for influenza? Lisa Jardine investigates how this challenge is met.
The BBC's international radio station
