Back button not showning

Hi all

I followed the steps for creating back button to detail page come from list -and I need to back to the list -but back button not showing
this is my index code

<!DOCTYPE html>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
    <link href="lib/ionic/css/ionic.css" rel="stylesheet">
    <link href="css/style.css" rel="stylesheet">

    <!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
    <link href="css/" rel="stylesheet">

    <!-- ionic/angularjs js -->
    <script src="lib/ionic/js/ionic.bundle.js"></script>

    <!-- cordova script (this will be a 404 during development) -->
    <script src="cordova.js"></script>

    <!-- your app's js -->
    <script src="js/app.js"></script>
  <body ng-app="starter">
    <ion-nav-bar class="bar-positive">

and this is my details page

<ion-header-bar class="bar-positive">
  <h2 class="title">Resume</h2>
<ion-view >
  <ion-content >
    <ion-list class="list-inset">
      <ion-item class="item-text-wrap"
                ng-repeat="item in artists | filter: { shortname: whichartist }">
        <img ng-src="img/{{item.shortname}}_tn.jpg"
             alt="{{ }} Photo">
        <h2>{{ }}</h2>
        <h3>{{ item.reknown }}</h3>

can I get help how to show the back button

sorry and thanks - I solved it

the problem in the details page instead of use hear in this code

<ion-header-bar class="bar-positive">
  <h2 class="title">Resume</h2>

remove this and replace it with this code

<ion-view view-title="Resume" class="bar-positive ">