TY  - GEN
AU  - Fertik,Michael
TI  - A tale of two internets
SN  - 0036-8733
PY  - 2013///0215
KW  - Advertising
KW  - Humans
KW  - Internet
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1038/scientificamerican0213-13
ER  -