1. The American Movement for International Copyright, 1837-60
AJ Eaton - The Library Quarterly

http://www.jstor.org/pss/4303319

2.Dickens, Poe and the international copyright battle
Ann Tobin, M.Dickensian (0012-2440)
2002. Vol.98,No.2;p.119-126

3.PICTURE OF POE COPYRIGHT BY AMELIA POE IN 1893
Emerson Society Quarterly (0013-6670)
1963. Vol.31;

实在是找不到了，谢谢大家帮忙！！！