Not all fields returned with getListItems

I am calling getListItems on a SharePoint list with this query:

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:soap1="http://schemas.microsoft.com/sharepoint/soap/"><soap:Header/><soap:Body><soap1:GetListItems><soap1:listName>Success Stories</soap1:listName><soap1:rowLimit>300</soap1:rowLimit></soap1:GetListItems></soap:Body></soap:Envelope>

I get about 20 out of 30 fields back.  The fields I am not getting back are not empty.  Without having to specify a viewFields section specifying each and every field, what can I do to get SharePoint to return all the data?

Thanks,

Dale