A collection of live natural radio streams of the VLF band from around the world is available at http://abelian.org:8040/vlf/

NSPIRE VLF radio receiver at NASA's Marshall Space Flight Center http://www.spaceweather.com/glossary/inspire.html

Renato Romero IK1QFK Very Low Frequency (VLF) page http://www.vlf.it/

RSGB Book shop - Radio Nature by Renato Romero, IK1QFK http://www.rsgbshop.org/acatalog/Online_Catalogue_What_s_New_26.html

Very Low Frequency Research Group http://www-star.stanford.edu/~vlf/

Weak Signal software for LF http://www.weaksignals.com/

Natural Radio VLF Yahoo Email group http://groups.yahoo.com/group/VLF_Group/