ayaḿ cāsyāgrajaḥ śrīmān
rāmaḥ kamala-locanaḥ
pralambo nihato yena
vatsako ye bakādayaḥ
ayam -- this; ca -- and; asya -- His; agra-jah -- elder brother; sri-man -- the possessor of all opulences; ramah -- Lord Balarama; kamala-locanah -- the lotus-eyed; pralambah -- the demon Pralamba; nihatah -- killed; yena -- by whom; vatsakah -- Vatsasura; ye -- who; baka -- Bakasura; adayah -- and others.
In fact two of the demons mentioned here were killed by Krishna, not Balarama. The reason for the mistake is that as news of Krishna's exploits spread among ordinary people, the facts became somewhat muddled. The same tendency can be observed in modern newspapers.