ISBN 978-621-404-542-6(paperback)
ADVISORY
Due to the ongoing maintenance of our data center, access to the International Standard Numbering System - Philippine Online Numbering Application System (ins-poas.nlp.gov.ph) will be limited from 8:00 am to 5:00 pm until further notice.
Additionally, please be informed that the website will be completely unavailable on May 10 to 12 due to scheduled server maintenance.
Please schedule your transactions accordingly.
We apologize for any inconvenience this downtime may cause and appreciate your understanding. Thank you!