This instalment was originally published in Look and Learn issue no. 686 on 8 March 1975.
The Heat Controller (continued . . .)
This instalment was originally published in Look and Learn issue no. 685 on 1 March 1975.
This instalment was originally published in Look and Learn issue no. 686 on 8 March 1975.
This instalment was originally published in Look and Learn issue no. 685 on 1 March 1975.