 Nolan , Keith W. Into Cambodia : Spring Campaign , Summer Offensive , 1970 . Novato CA : Presidio Press , 1990 . 
 Nolan , Keith W. Into Cambodia : Spring Campaign , Summer Offensive , 1970 . Novato CA : Presidio Press , 1990 . 
Nolan , Keith wid. Into Cambodia : Spring Campaign , Summer Offensive , 1970 . Novato CA : Presidio Press , 1990 .