Howard the Duck is a was published by Marvel Comics. He first appeared in Adventure into Fear 19 (Dec. 1973). Since that time, Howard the Duck has went on to have his own series which lasted up to issue 33. He has had a couple of mini-series and even a few guest appearances in other comics, including Marvel Zombies.

Howard the Duck Series 1
Howard the Duck #1	Howard the Duck #2	Howard the Duck #3	Howard the Duck #4
Howard the Duck #5	Howard the Duck #6	Howard the Duck #7	Howard the Duck #8
Howard the Duck #9	Howard the Duck #10	Howard the Duck #11	Howard the Duck #12
Howard the Duck #13	Howard the Duck #14	Howard the Duck #15	Howard the Duck #16
Howard the Duck #17	Howard the Duck #18	Howard the Duck #19	Howard the Duck #20
Howard the Duck #21	Howard the Duck #22	Howard the Duck #23	Howard the Duck #24
Howard the Duck #25	Howard the Duck #26	Howard the Duck #27	Howard the Duck #28
Howard the Duck #29	Howard the Duck #30	Howard the Duck #31	Howard the Duck #32
Howard the Duck #33	Howard the Duck Annual #1

Howard the Duck Series 2
Howard the Duck - Series 2 #1	Howard the Duck - Series 2 #5	Howard the Duck - Series 2 #3	Howard the Duck - Series 2 #4
Howard the Duck - Series 2 #5	Howard the Duck - Series 2 #6