Dear Professors and colleagues, I was wondering if there are different sampling methods for internet data than the already known sampling methods. For my research, I was thinking of taking a *systematic random sample* from facebook posts on a each of four facebook pages. I have no information about the heterogeneity between the different pages according to any variable (gender, political affiliation...) so I thought it is not stratified nor cluster, and it will be more likely a systematic sample. Is systematic sampling* logically right*? Did any one come across *other sampling techniques for facebook pages*? or internet data in general? Can anyone suggest *a book to read about this*? I would love to hear any advice from you. Yours, *Noha A.Nagi*