I need to create a new View which can´t be editable and the button Create has to be disabled, but the Import should stay.
With create = "false" the import option is disabled too, is there any option to keep it or I need to create a new button which makes the same action?
I use Odoo 8.
My code:

<record id="historic_quote_sale_order_tree_view" model="ir.ui.view">                
    <field name="name">historic.tree</field>                
    <field name="model">historic.sale.order</field>                
    <field name="arch" type="xml">                    
        <tree string="Historic Sale Form" create="false" edit="false">                            
            <field name="id_offer_register"/>                            
            <field name="id_offer"/>                            
            <field name="num_offer"/>                            
        </tree>                
    </field>        
</record>

Thanks in advance.