This instalment was originally published in Look and Learn issue no. 689 on 29 March 1975.
The Heat Controller (continued . . .)
This instalment was originally published in Look and Learn issue no. 688 on 22 March 1975.
This instalment was originally published in Look and Learn issue no. 689 on 29 March 1975.
This instalment was originally published in Look and Learn issue no. 688 on 22 March 1975.