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A list of English Language niche specific web directories and related websites for submission.
Add your site - $10 per month
physnet.uni-oldenburg.de
Category: Web Directories
hiramp.tripod.com
physics-directory.com
physics.org
llek.de
dctech.com
het.brown.edu
aip.org
radwaste.org
rain.org
web.mit.edu
physcon.ru