x: MSL 14, 018 Bb r vi 7-8.
ŋeš-gal: OB Nippur Ea 547 (ŋišgal[station]).
ŋeš-gal-lum: Ebla Sign List 15 (ŋišgal[station]).
ŋiš-gal: MSL 14, 029 Lf r iii' 7 (ŋišgal[station]).
u₄: MSL 14, 029 Lf r iii' 6; OB Nippur Ea 546 (u[unmng₁]); MSL 14, 029 Lg o 15; Education in the Earliest Schools no. 126 o i 7.