public calendar and sub-calendar sharing

[ramyaq]

I am currently trying to incorporate shared calendaring within our
workgroup. I would like to set up a calendar to keep track of
personnel who are traveling among our offices overseas.

How can I set up individual calendars that then feeds to one main
calendar, all in the public folder. Pretty much have the entries
entered in sub calendars, automatically recorded into one main
calendar.

Thanks in advance for your help.