Daniel I. Block (EDT)/ Kenneth A. Mathews (EDT)/ David S. Dockery (EDT)
(1)
Karen E. Lange/ National Geographic Society (U. S.)/ Ira Block (PHT)
(1)
Louis S. Block/ William A. Coppel
(1)
Michael E. Heyes (EDT)/ Linda C. Ceriello (CON)/ Thomas S. Franke (CON)/ John Block Friedman (CON)/ John W. Ellis-etchison (CON)
(1)
Seymour S. Block Ph.D./ Santiago A. Tavares
(1)