Nauleṭan, Ec. Ṭī ; Lāl, Sohan (1922) Jug̲h̲rāfiyah-yi ʻālam : ḥiṣṣah duvvum sātven̲ jamāʻat ke t̤ulbā ke liye. Ejūkeshnal Pablisharz. ISBN: .