The 5th edition was rewritten by new editor Nicolas Slonimsky, who would remain editor for several decades (through the 8th edition in 1992) and have a considerable influence on the style and content of the dictionary.
Heiden's music is described by Nicolas Slonimsky, another composer, as "neoclassical in its formal structure, and strongly polyphonic in texture; it is distinguished also by its impeccable formal balance and effective instrumentation."
In his teens he some of his teachers included Nicolas Slonimsky (editor of Baker's Biographical Dictionary of Musicians) in 1936 and Ernst Krenek in 1937 (Tommasini 2013).
Baker's Biographical Dictionary of Musicians, Seventh edition, revised by Nicolas Slonimsky, New York: Macmillan Publishing Co., Schirmer Books, 1984
Nicolas Slonimsky described the cellos-on-the-right arrangement as part of a 20th century "sea change" (Lectionary of Music, p. 342 (McGraw-Hill 1989).
Nicolas Sarkozy | Nicolas Cage | Nicolas Poussin | Nicolas Baudin | Nicolas Roeg | Nicolas Anelka | Nicolas Philibert | Nicolas Léonard Sadi Carnot | Nicolas Winding Refn | Nicolas Steno | Nicolas Bourriaud | Nicolas | San Nicolás | Nicolas Slonimsky | Nicolas Oudinot | Nicolas Hulot | Nicolas Hodges | Nicolás Guillén | Nicolas Boileau-Despréaux | Nicolas Berggruen | San Nicolas Island | San Nicolas | Nicolas Louis de Lacaille | Nicolas Ghesquière | Louis Nicolas Vauquelin | Theodore Nicolas Gobley | San Nicolás District, Carlos Fermín Fitzcarrald | Nicolas-Théodore de Saussure | Nicolas Schöffer | Nicolás Sarquís |