bibliographic vs bibliographical

bibliographic and bibliographical both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bibliographic	No	Yes	No	No
bibliographical	No	Yes	No	No

As adjectives, bibliographic and bibliographical are synonyms defined as:

bibliographic and bibliographical: relating to or dealing with bibliography

bibliographic (adjective)	bibliographical (adjective)
relating to or dealing with bibliography	relating to or dealing with bibliography