Deletion of Tank research and development

Comment: The topic is notable: see http://books.google.co.uk/books?id=FVscHAAACAAJ&dq=intitle:tank+intitle:research&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=0&ei=Jzc3S9bPEJHWyQS6r9mcAg&cd=15 The Tank Builders: A History of Early Soviet Armor Research and Development, for example.  The rest is a matter of ordinary editing per our |editing policy
Stance: keep
Cited policy: Wikipedia:Editing policy (WP:IMPERFECT)