In 1959, as he prepared the seventh edition of his Textbook of Pediatrics, Waldo E. Nelson enlisted his family to help compile the index. Nelson would call out items from each page and his wife and three children would write them down on index cards.
Only after the book appeared did he notice this entry:
Birds, for the, 1-1413
It was removed in the next edition. The culprit, Nelson’s daughter Ann, later married pediatrician Richard E. Behrman — after he promised never to ask her to help him write a textbook.