[ https://archive.org/details/b21460498/page/n9?q=mineral+waters+and+medicinal+springs+of+essex История минеральных вод и лечебных источников графства Эссекс] [ https: //archive.org/details/b21460498/page/n7?q=mineral+waters+and+medicinal+springs+of+essex фотостраница ]
PD-US Общественное достояние в США //en.wikipedia.org/wiki/File:Spa_Pump_Room_at_Hockley,_1910.jpeg
