Wallert, Werner. <br/><br/>
Hostage Terror: Abducted by the Abu Sayyaf / 
Werner Wallert. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wallert, Werner, 1943 - Captivity<br/>Hostages - Philippines - Biography<br/>Hostages - Germany - Biography<br/>Political kidnapping - Philippines<br/>Terrorism - Philippines - Politics and government