The Increased Difficulty of Concentration. New York / CSC Court Theatre
- Document's type: Programme
- Author: Václav Havel (Author) / Larry Wismer (Director) / Věra Blackwell (Translation)
- Date of origin: 1. 7. 1972
- Record's ID: 9994
Vyúčtování: Jonathan Cape Limited
- Document's type: Document of payment/Payment receipt / Miscellaneous texts
- Author: Václav Havel (Author) / Věra Blackwell (Translation)
- Date of origin: 31. 12. 1972
- Record's ID: 17721