diff --git a/webgis/index.html b/webgis/index.html
index 1c85a83..d5337f5 100644
--- a/webgis/index.html
+++ b/webgis/index.html
@@ -70,11 +70,6 @@
                     <i class="fa fa-search"></i>
                 </span>
             </button>
-            <button class="button is-outlined is-rounded mr-4 mt-1" id="howto" title="Istruzioni">
-                <span class="icon has-text-black">
-                    <i class="fas fa-question"></i>
-                </span>
-            </button>
         </div>
     </nav>
     <div class="wait-lg text-center is-hidden" style="clear: both;">
@@ -320,7 +315,7 @@
     <!-- Search modal -->
     <div class="modal" id="search" data-modal-target="modal">
         <div class="modal-background" data-action="click->modal#close click->tabs#reset"></div>
-        <div class="modal-content has-background-white pt-4 mr-4 ml-4 pl-4 pr-4" style="min-height: 400px;">
+        <div class="modal-content box has-background-white pt-4 mr-4 ml-4 pl-4 pr-4" style="min-height: 400px;">
             <h1 class="is-size-4 has-text-centered">Ricerca</h1>
             <div class="field">
                 <label class="label">Testo libero</label>
@@ -341,6 +336,7 @@
                         </div>
                     </div>
                 </div>
+                <!--
                 <div class="field column">
                     <label class="label">Categoria reperto</label>
                     <div class="control">
@@ -358,6 +354,7 @@
                         </div>
                     </div>
                 </div>
+                -->
                 <div class="field column">
                     <label class="label">Tecnica muraria</label>
                     <div class="control">
@@ -375,7 +372,7 @@
                     </div>
                 </div>
             </div>
-            <div class="field is-grouped mt-5 has-text-right">
+            <div class="field is-grouped mt-5 mb-0 pb-0 has-text-right">
                 <div class="control">
                     <button class="button is-link">
                         <span>Cerca</span>
diff --git a/webgis/js/components/Prehistoric.js b/webgis/js/components/Prehistoric.js
index 0941e69..9e69aa2 100644
--- a/webgis/js/components/Prehistoric.js
+++ b/webgis/js/components/Prehistoric.js
@@ -44,6 +44,13 @@ export class Prehistoric {
             <p class="p-2 mb-4">
                 <strong>Autore scheda:</strong> ${this._data.author}
             </p>
+            <p class="mt-4 pl-2 pr-5">
+                <span class="icon has-text-link">
+                    <i class="fa fa-book"></i>
+                </span>
+                <strong>Bibliografia:</strong> ${await this.biblio(this._data.id)}
+            </p>
+            <div class="notification is-light mx-3 mt-4 mb-0 p-2 is-hidden" data-biblio-target="biblio"></div>
         </div>`;
 
         /*
diff --git a/webgis/js/ui.js b/webgis/js/ui.js
index 2863fae..ae535e2 100644
--- a/webgis/js/ui.js
+++ b/webgis/js/ui.js
@@ -193,7 +193,7 @@ UI.openPrehistModal = function (data, selector) {
 	prehistoric.data = data;
 
 	// For Stimulus biblio_controller
-	//GisState.bibliography = prehistoric;
+	GisState.bibliography = prehistoric;
 	prehistoric.render().then(html => modal.querySelector('#prehist-sheet').innerHTML = html);
 	prehistoric.setImages(modal.querySelector('#photos'), this.imageGallery);
 	modal.classList.add('is-active');