Numerical Integration ( Double integral with log singularity)



Hi, my name is Can studying at Aerospace Engineering Department of 
Middle East Technical University
I couldnt find the option for,

/                                                    Integral from 0 to 
L ( Integral from 0 to L//( ln(abs(x1-x2))))dx1dx2/
How can double integral shown above be calculated numerically ?
Thank you
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