Carl Andre writes to Ruth and Marvin Sackner, "Thank you for forwarding the bibliography of your monumental collection. It was such a great pleasure to meet you & to see the great works & publications which you have gathered together. Thank you also for helping to make Ana's & my stay in Miami so delightful & rewarding." -- Source of annotation: Marvin or Ruth Sackner.

Carl Andre writes to Ruth and Marvin Sackner, "Ana Mendieta & I wish to thank you very much for the wonderful evening you shared with us in Miami. Your collection & archive are truly of the aesthtic & historic first rank. It is so rare to find such depth in an American collection." -- Source of annotation: Marvin or Ruth Sackner.