All Fields available for a New Bill with Child Records

The list and structure of a Custom URL with all possible fields, including those for Line Items that are drawn from Child Records, utilized is below. Required fields are in red. All other fields are optional.

/apex/breadwinner_ns__CreateBill             
?originating_record={!salesforce_record_ID}  
&parent_account=api_field_name__c         
&custom_form=bill_custom_form_api_field__c
&currency=bill_currency_api_field__c       
&department=bill_department_api_field__c   
&class=bill_class_api_field__c             
&location_id=bill_location_api_field__c    
&date=bill_date_api_field__c               
&due_date=bill_due_date_api_field__c       
&memo=sales_order_memo_api_field__c        
&child_relationship_name=child_name__r     
&co_netsuite_item=netsuite_item_field__c   
&co_description=description_field__c       
&co_quantity=quantity_field__c             
&co_rate=rate_field__c                     
&co_department=department_field__c         
&co_class=class_field__c                   
&co_location_id=location_field__c          
&testing=true                                  