USU Conference Systems
Conference Help
User
Username
Password
Remember me
Notifications
View
Subscribe
/
Unsubscribe
Conference Content
Search
All
Authors
Title
Abstract
Index terms
Full Text
Browse
By Conference
By Author
By Title
Font Size
Information
For Readers
For Authors
Home
Log In
Archive
Registration
Schedule
Home
>
Search
>
Author Details
Author Details
Purba, Hasim, Universitas Sumatera Utara, Medan Indonesia, Indonesia