LS-Fritz Busch; LS-Arthur Bodansky; LS-Ossip Gabrilowitsch; LS-Carlos Chavez; LS-Theodore Bloomfield; LS-Simon Asen; LS-Nicolai Berezowsky; ALS-Paul Frederic Bennyhoff; Fritz Busch recording arrangements and fees; Telegrams from Arturo Toscanini to Fritz Busch; Applications for conductor and assistant conductor positions; Newspaper report on offer of Philharmonic conductorship to Fritz Busch by Arturo Toscanini; Programs of Carlos Chavez, 1937; Engagement of Issay Dobrowen, 1932; Engagements of Ossip Gabrilowitsch, 1923-35; Letter from Arthur Bodansky declining offer to conduct Philharmonic, 1921