Hmm. I have seen that site (REUK). The info about the 4060B is ok and is quite interesting. However,the article that combines the 4060B and the NE555 timer is complete and utter rubbish. I took one look at the circuit and nearly died laughing. Then I decided to build the damn thing and try to make it work. 4 months later still trying. REUK should be Horsewhiped and then Shot at dawn for wasting my time and lots of others time.
A 4011 or a 4093 connected as an Astable oscillator is probably the best way of doing this. However, I believe only timings of up to 30 mins are possible.
Hope that helps someone and most of all saves some time that would otherwise be wasted
SMM