1.没有目录和封面吧
1,http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%234886%232011%23996220220%233218736%23FLA%23&_cdi=4886&_pubType=J&_auth=y&_acct=C000050165&_version=1&_urlVersion=0&_userid=1002903&md5=75927d795debcb43fdae6e0c653ec099
2,http://www.thelancet.com/journals/lancet/issue/current?tab=past