* In the years since that book was first published, the light has been getting brighter on a number of topics, and some of the expressions used in that songbook have become outdated.
* در این مدت ،‏ نور بیشتری بر چند موضوع تابیده شده است و برخی از واژه‌ها نیز دیگر مورد استفاده قرار نمی‌گیرد .‏