Little Catawissa Creek
... that it is not known why river chubs have disappeared from Little Catawissa Creek?
... that it is not known why <a href="./River_chub" id="mwB7A" rel="mw:WikiLink" title="River chub">river chubs</a> have disappeared from <b id="mwB7E"><a href="./Little_Catawissa_Creek" id="mwB7I" rel="mw:WikiLink" title="Little Catawissa Creek">Little Catawissa Creek</a></b>?