Text : "Entrez Direct: E-utilities on the command line"
UserSession : "2014-05-15_12:12:30_psgendb"
Package : "NCBI-edirect"
File : "$doc\/NCBI\/edirect\/chapter6.pdf"
Program : "edirect.pl"
Program : "econtact"
Program : "edirutil"
Program : "efilter"
Program : "einfo"
Program : "elink"
Program : "enotify"
Program : "epost"
Program : "eproxy"
Program : "esearch"
Program : "esummary"
Program : "nquire"
Program : "xtract"
Program : "efetch"