The problem of the green capsule
Subtitle: being: the psychologists' murder case.
Edition: 1st ed.
Publisher: Harper
Published: 1939
Place of publication: New York
Language: eng
Number of pages: 286
Subjects: Fell, Gideon (Fictitious character) -- Fiction.; Private investigators -- England -- Fiction.
Notes: "This story is published in England under the title of 'The black spectacles'."