Calvin Dodd MacCracken (1919-1999) was an American inventor who made important contributions to energy storage technology and the construction of ice rinks.
Calvin Dodd MacCracken (1919-1999) was an American inventor who made important contributions to energy storage technology and the construction of ice rinks. (en)
Calvin Dodd MacCracken (1919-1999) was an American inventor who made important contributions to energy storage technology and the construction of ice rinks. (en)