Photographs and text offer a thorough account of the German heavy mortars employed during WWII.[AuthorName]By Joachim Engelmann[/AuthorName][AuthorBio][/AuthorBio][NumIllustration]b/w photographs, line drawings[/NumIllustration][CoAuthor][/CoAuthor][SubTitle][/SubTitle][ColorPattern]b/w photographs, line drawings[/ColorPattern]