This work was first published in Bangladesh and is now in the public domain because its copyright protection has expired by virtue of the Copyright Act, enacted 2000 (details). The work meets one of the following criteria:
It is an anonymous, pseudonymous or posthumous work and 60 years have passed since the year of its publication
It is a photographic or cinematographic work and 60 years have passed since the year of its publication
It is a government work or a work of an international organisation and 60 years have passed since the year of its publication
It is a literary, dramatic, musical or artistic work and 60 years have passed since the year of death of the author (or last-surviving author)
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 60 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, and Switzerland and the United States are 70 years.
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.