From the NASA History Division:
"The NASA History Division is saddened to note the passing of Dr. Robert C. Seamans, Jr. on Saturday, June 28. During a very distinguished career, Dr. Seamans served as the NASA Associate and Deputy Administrator during much of the 1960s. He wrote two books that the NASA History Division published, an autobiography and a managerial account of the Apollo program. Please see http://history.nasa.gov/Biographies/seamans.html for links to these two publications, a link to the NASA Administrator's statement on Dr. Seamans' death, and biographical information about him. "