00792nam a2200193Ia 4500 CTU_218654 210402s9999 xx 000 0 und d 813 T253 Tepper, Sheri S. After long silence Sheri S. Tepper New York Bantam Books 1987 On the planet Jubal, human colonization has been restricted by massive crystalline "presences" which may or may not be sentient, but in order to protect them from destruction, they must be convinced to break their long silence. Science fiction, American,Tiểu thuyết khoa học, Hoa Kỳ,American fiction,Tiểu thuyết Mỹ Qhieu Trung tâm Học liệu Trường Đại học Cần Thơ