Robinson, Lloyd, 1935- is not used in this library's catalog.

For works of this author entered under other names, search also under Hamilton, Franklin, 1935- ,  Hollander, Paul,  Robinson, Lloyd, 1935-,  Chapman, Walker,  Sebastian, Lee,  Dexter, John, 1935-,  Elliott, Don, 1935-,  Knox, Calvin M.,  Osborne, David, 1935-,  Beauchamp, Loren  For works written in collaboration with Randall Garrett, search also under Randall, Robert, 1935-  

is used instead.

Try a search for Silverberg, Robert