Copy of the letter received by Ershov as a member of the IFIP WG2.1. The author requests to specify some points of the Amsterdam meeting Draft Agenda, especially those concerning the informal discussion on Algol Y Date: 05.04.1967 Original document language: English Authors: Peter J. Landin Organizations: MIT Persons: John McCarthy, Calvin C. Elgot Addressee: Willem Louis van der Poel