Science of Discworld
Pratchett, Terry
Echoes of Empire
Correl
The Door Into Summer
Heinlein, Robert A.
The effects of androgen depletion on human erectile function: ...
C Bettocchi & F Palumbo & L Cormio & P Ditonno & M Battaglia & F P Selvaggi
International Journal of Impotence Research (16.06)
Robert A. Heinlein
His Majesty's Dragon
Naomi Novik