Foxpro 7 SELECT with JOINS

We have a legacy application that uses an advantage database server, serving .dbf   We access the data with Foxpro 7.   I'm trying to do a query like the following, but cannot get the syntax right for the JOIN   here is my sql without the join

Close Data
SET EXCL OFF

SELECT   s.batch, s.code, s.class, s.nir, s.account, s.arrival, s.return, f.name, s.describe, s.due, b.item as Special_Item, b.amount as Special_Amt, ;
             s.farmname, c.first, c.last, c.business, c.discount, c.pricetier, s.postage, c.billto, c.address1, c.city, c.state, c.zip, ;
             c.fax, c.phone, c.email;  
  FROM samples s, samplexp x, clients c, feedcode f, billitem b;
  WHERE  s.batch = 11748 AND x.location="LANCSAMPLE" AND;
          (s.sampleid = x.sampleid) AND;
              (s.account = c.account) AND;
              (s.feed_type = f.feed_type) AND;
              (s.account = b.account)
                                                   
COPY TO C:\lancasterTest\lancBill TYPE DELIMITED

Return      

I'm trying to do an LEFT/RIGHT OUTER JOIN on the following, as I don't want the data from billitem all to come over.   (s.account = b.account)