* {{cite book | last=Haber | first=L. F. | title=The Poisonous Cloud:Chemical Warfare in the First World War | publisher=Clarendon Press | publication-place=Oxford | date=1986-02-20 | isbn=0-19-858142-4}}
<ref name="b582">{{cite book | last=Haber | first=L. F. | title=The Poisonous Cloud:Chemical Warfare in the First World War | publisher=Clarendon Press | publication-place=Oxford | date=1986-02-20 | isbn=0-19-858142-4 | page=}}</ref>