# app-ads.txt file for oldbooks.com
# This file must be accessible at: https://your-domain.com/app-ads.txt
# 
# Format: <Field #1>, <Field #2>, <Field #3>, <Field #4>
# Field #1: Advertising system domain name
# Field #2: Publisher's account ID
# Field #3: Type of account/relationship (DIRECT or RESELLER)
# Field #4: Certification authority ID (optional)

google.com, pub-9189593829339774, DIRECT, f08c47fec0942fa0