How can I combe fields in a query when 1 fields is empty?

[WalterInOz]

I'm combining 4 fields in a query but am running into trouble when 1 of the fields contains no data, which is sometimes correct. The result is that the field displaying the outcome of the combine query is empty, which is not what i wanted to achieve.
Here's how I currently combine 3 fields:

Journalinfo: [Journal]+", Vol. "+[Volume]+", "+[Pages]

Sometimes I need to keep Volume and pages empty and I end oup with an empty field in the form.

Is it at all possible to use an empty field in a combined query?
Any tips?

 

[pbaldy]

You can use the fact that the + concatenation operator propagates Nulls,while the & operator does not.

 

[WalterInOz]

Thank you Paul, replacing + by & does the job. GREAT