Study of Phase Equilibrium on CO(NH2)2-H3BO3-H2O System At 25 ℃ and 35 ℃
Guo Zhi-Qin; Jiang Cheng-Fa; Su Yu-Guang
Acta Phys. -Chim. Sin. . 1992, (06): 829 -833 .  DOI: 10.3866/PKU.WHXB19920622