伪造实寄封 Faked Entire

首日实寄封 First Day Entire Cover ; First-day posted cover

实寄封 Entire Cover

实寄邮简 Posted letter sheet

实用寄存器 utility register

随寄证实书 Mail confirmation to follow

实验寄生虫学 [基医] EXPERIMENTAL PARASITOLOGY

实时数据寄存器 real-time data register

实用寄生虫病杂志 JOURNAL OF PRACTICAL PARASITIC DISEASES