Heterotic mini-landscape (II): Completing the search for MSSM vacua in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msub><mml:mi mathvariant="double-struck">Z</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math> orbifold
Physics letters. B