1670s, "the writing of books," from Greek bibliographia "the writing of books," from biblion "book" (see biblio-) + graphos "(something) drawn or written" (see -graphy). Meaning "the study of books, authors, publications, etc.," is from 1803. Sense of "a list of books that form the literature of a subject" is first attested 1814. Related: Bibliographic.
compound adjectival word-forming element, usually interchangeable with -ic but sometimes with specialized sense (such as historic/historical, politic/political), Middle English, from Late Latin -icalis, from Latin -icus + -alis (see -al (1)). Probably it was needed because the forms in -ic often took on a noun sense (for example physic). Forms in -ical tend to be attested earlier in English than their twins in -ic.
<a href="https://www.etymonline.com/word/bibliographical">Etymology of bibliographical by etymonline</a>
Harper, D. (n.d.). Etymology of bibliographical. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/bibliographical