In the 382–letter correspondence it is the location of its mayor/ruler, Pu-Ba'lu, who authored 3 letters written to the pharaoh, namely EA 314-316, (EA for 'el Amarna').
The three letters to the pharaoh from Pu-Ba'lu of Yursa are:
Of the entire Amarna letters 382–letter corpus, Yursa is only referenced in letters 314, and 315, as: "..Pu-Ba'lu, the ruler of Yursa".
Example letter of Yursa/Pu-Ba'lu
EA 314, title: "A shipment of glass"
"To the king (i.e. Pharaoh), my lord, my god, my Sun, the Sun from the sky: Message of Pu-Ba'lu, your servant, the ruler of Yursa. I indeed prostrate myself at the feet of the king, my lord, my god, my Sun: the Sun from the sky. 7 times and 7 times, on the back and on the stomach. I am indeed guarding the place of the king, (my) lord, my Sun, the Sun from the sky. Who is the dog that would not o]be[y the orders of the king, the Sun from the sk]y? [Since the king, my lord, has ord[ere[d] some glass, I [s]end it to the king, my lord, my god, the Sun from the sk[y]."