When you need to quickly find a certain event, or see events that have a certain characteristic (such as place, time, topic, or people involved), you can use the filtering options.
Filter by sub-calendar
Use this method to show all events on the selected sub-calendar.
Note the entries with color stripes, indicating those events have been assigned to other sub-calendars too. You can click the link Share (which appears below the Filter text box, on the sidebar) to get the URL for the filtered view; then you can easily share that filtered view with anyone. (Be sure not to do this from your Admin link, as the sharing link will include the admin calendar key used to create it.)