I came across this sentence the other day and I would appreciate a clarification:
Prepared specially for the students of university of Kerala, this book will also be invaluable to students and teachers of English grammar across the country.
In the first part of the sentence the usage of the is understandable (which according to me the word students is specified by of the university of Kerala), but in the second part of the sentence, even though students and teachers is made specific by of English grammar across the country, the article the is not used.