The main themes of Noel B. Gerson's writing included personalities and events in American history. Among the subjects of his biographies were Sam Houston, Kit Carson and Presidents Andrew Jackson and Theodore Roosevelt. As Dana Fuller Ross, he wrote the popular ''Wagons West'' series; as Donald Clayton Porter, he wrote the ''White Indian'' series. Two of his novels, ''55 Days at Peking'' and ''The Naked Maja,'' were made into movies.

Noel B. Gerson, who wrote 325 books of fact and fiction under his own name and several pseudonyms, died at the age of 75 in 1988.

Mr. Gerson is survived by his wife, Marilyn, and a son, Paul, both of Boca Raton; three daughters, Noel-Anne Brennan of Peacedale, R.I., Michelle Schechter of Fort Pierce, Fla., and Margot Burgett of Moose River, Me., and four grandchildren.