Mae germau'n fy ngwneud i'n sâl! /
Berger, Melvin,1927-
Hafner, Marylin.
Penryn : Ivan Corbett,
1990.
Arg Saesneg gwreiddiol = Original English ed: Harper & Row, 1985
Addasiad Cymraeg gan Berwyn Prys Jones = Welsh adaptation by Berwyn Prys Jones
Medical microbiology