PS-files of selected papers not available on the arXive

• Non--Harmonic Gauge Coupling Constants in Supersymmetry and Superstring Theory,
  J. Louis, Talk at PASCOS 1991,
  
  
• Moduli-Dependence of String Loop Corrections to Gauge Coupling Constants,
  L. Dixon, V. Kaplunovsky, J. Louis, Nucl. Phys. B355 (1991) 649,
  
  
• On Effective Field Theories Describing (2,2) Vacua of the Heterotic String,
  L. Dixon, V. Kaplunovsky, J. Louis, Nucl. Phys. B329 (1990) 27,