by the Government of Thailand, Act Establishing Changwat Samut Prakan…
“ Amphoe Nonthaburi and Amphoe Pak Kret shall be separated from the administration of Changwat Phra Nakhon, whilst Amphoe Bang Kruai, Amphoe Bang Yai and Amphoe Bang Bua Thong shall be separated from the administration of Changwat Thon Buri, to constitute a Changwat called Changwat Nonthaburi. ”
