Columbia subject headings:
Smokeless tobacco--Afghanistan.
Smokeless tobacco--Pakistan.
Snuff.
Tobacco chewing--Afghanistan.
Tobacco chewing--Pakistan.
Harvard subject headings:
Smokeless tobacco--Afghanistan.
Smokeless tobacco--Pakistan.
Snuff
Tobacco chewing--Afghanistan.
Tobacco chewing--Pakistan.
Princeton subject headings:
Smokeless tobacco--Afghanistan.
Smokeless tobacco--Pakistan.
Snuff.
Tobacco chewing--Afghanistan.
Tobacco chewing--Pakistan.