{"data":{"id":494,"title":"Combinatorics","edition_statement":"Version 2.1","volume":null,"copyright_year":2022,"isbn10":null,"isbn13":null,"license":"Attribution-NonCommercial-ShareAlike","language":"eng","accessibility_statement":null,"accessibility_features":["unknown"],"description":"Combinatorics is an upper-level introductory course in enumeration, graph theory, and design theory.","contributors":[{"id":4297,"contribution":"Author","primary":true,"corporate":false,"title":null,"first_name":"Joy","middle_name":null,"last_name":"Morris","location":"University of Lethbridge","background_text":"Joy Morris is a Professor in the Department of Mathematics \u0026 Computer Science at University of Lethbridge."}],"subjects":[{"id":3,"name":"Computer Science","parent_subject_id":null,"call_number":"QA76","visible_textbooks_count":137,"url":"https://open.umn.edu/opentextbooks/subjects/computer-science-information-systems"}],"publishers":[{"id":435,"url":"http://www.cs.uleth.ca/~morris/Combinatorics/Combinatorics.pdf","year":null,"created_at":"2018-09-07T12:22:39.000-05:00","updated_at":"2020-08-30T12:56:51.000-05:00","name":"Joy Morris"}],"formats":[{"id":748,"type":"PDF","url":"https://www.cs.uleth.ca/~morris/Combinatorics/Combinatorics.pdf","price":{"cents":0,"currency_iso":"USD"},"isbn":null}],"rating":null,"textbook_reviews_count":0,"reviews":[],"url":"https://open.umn.edu/opentextbooks/textbooks/combinatorics","updated_at":"2026-05-18T02:06:05.000-05:00"}}