Letter to the Editor
On behalf of Cuba
Dear Colleagues:
I had recently occasion to send a book and some reprints to the department of crystallography in the U. of Havana, Cuba. They were extremely grateful and explained how desperately short they were of teaching material. If readers could send reprints or other materials, the effort would be worthwhile and much appreciated. The address is: Prof. H. P. Perez, Faculdad de Quimica, Universidad de la Habana, Cuba
A. MackayLondon, UK