Man pages matching name cross_product in section 3alleg4:

cross_product.3alleg4.en	debian 10 / allegro4-doc
cross_product.3alleg4.en	debian 11 / allegro4-doc
cross_product.3alleg4.en	debian 12 / allegro4-doc
cross_product.3alleg4.en	debian 13 / allegro4-doc