Dracula, Prisoner Of Frankenstein (1972)

aka's: The Screaming Dead/
Drácula Contra Frankenstein

Dracula (Howard Vernon) kills another innocent victim and Dr. Seward (Alberto Dalbés) decides it's time to wipe him off the face of the earth. Armed with a hammer and a wooden stake, he arrives at Castle Dracula and duly dispatches the vampire Count. Next day, however, Dr. Frankenstein (Dennis Price) arrives with his assistant, Morpho (Luis Barboo), and a large crate containing the monster. Using the blood of a pub singer who has been abducted by his creation, the doctor brings Dracula back to life and uses him for his own ends. The Count and a female vampire continue to terrorize the town, so Dr Seward once again sets out for Castle Dracula. Unfortunately, he is attacked by the Frankenstein monster and left for dead. Amira (Geneviève Robert), a gypsy, rescues him and summons up a werewolf to do battle with the forces of evil… Directed by Jess Franco.

Taken from a rare (uncut) English language print.