Exhibit 13

                                 PROMISSORY NOTE
                                 ---------------


$2,177,356.00             Oklahoma City, Oklahoma            September 30, 2005

      FOR VALUE RECEIVED,  Jerry D. Cash and Sherrie Cash ("Borrower"),  jointly
and severally, promise to pay to the order of Douglas L. Lamb, or his successors
or  assigns   ("Lender"),   the   principal  sum  of  Two  Million  One  Hundred
Seventy-seven Thousand, Three Hundred Fifty-six DOLLARS ($2,177,356.00) together
with interest thereon at the rate of six percent (6%) per annum.

      Lender is  acting as  nominee  and  agent  for the  following  principals:
Douglas L. Lamb,  Marsha K. Lamb,  Bonanza Energy  Corporation  of Kansas,  Lamb
Family Limited Partnership, and Crown Properties, LC.

      The entire principal balance and any unpaid interest under this note shall
be payable upon the earlier of the  following  maturity  dates:  (a) an Event of
Default as defined in the Pledge Agreement  between Borrower and Lender;  or (b)
on September 30, 2006.

      The  obligations  under this note  shall be  secured by all of  Borrower's
2,121,146 shares of Quest Resource Corporation  (evidenced by certificate #8775)
as provided in the Pledge Agreement between Borrower and Lender.

      If the  principal  and  interest is not paid when due,  then the holder of
this Note  shall  have the  right  and  option  to  declare,  without  notice to
Borrower, that the unpaid balance of principal and accrued interest on this Note
is due and payable,  and to  foreclosure  or require  foreclosure of any and all
collateral  securing  payment hereof,  and to exercise any and all of the rights
and remedies the holder may have under the Kansas uniform commercial code or any
other  instrument.  Failure to exercise  this  option upon  failure to make such
payment shall not  constitute a waiver of the right to exercise it at any future
date.

      All amounts paid  hereunder  shall be applied  first to all interest  then
accrued and unpaid hereunder,  and the balance,  if any, to principal.  All past
due  principal  and  interest on this Note shall bear  interest at 15% per annum
from maturity until paid. All sums called for, payable,  or to be paid hereunder
shall be paid in lawful money of the United  States of America which at the time
of payment is legal tender for the payment of public and private debts therein.

      If default is made in the payment of this Note at maturity  (regardless of
how its maturity may be brought  about) or the same is placed in the hands of an
attorney for collection,  or if suit is filed hereon,  or proceedings are had in
bankruptcy, probate, receivership, reorganization, or other judicial proceedings
for the  establishment of collection of any amount called for hereunder,  or any
amount  payable  or to be  payable  hereunder  is  collected  through  any  such
proceedings,  Borrower agrees to pay the holder of this Note a reasonable amount
as attorney's and/or collection fees and expenses.

      The obligations of each Borrower shall be joint and several.


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      Borrower  hereby  waives  presentment  and demand for  payment,  notice of
intent to accelerate  maturity,  notice of acceleration of maturity,  protest or
notice of protest and non-payment,  bringing of suit and diligence in taking any
action to collect any sums owing hereunder and in proceeding  against any rights
and  properties  at any  time  securing  payment  hereof,  and  agrees  that its
liability  on this Note shall not be affected by any release of or change in any
security for the payment of this Note.

      This  note  shall be  governed  by the laws of the  State of  Kansas.  The
undersigned shall be jointly and severally liable for the obligations under this
note.

      EXECUTED as of the date and year first above written.



                               BORROWER



                               /s/ Jerry D. Cash
                               ------------------------------------
                               Jerry D. Cash


                               /s/ Sherry J. Cash
                               ------------------------------------
                               Sherry J. Cash




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