A Method to Protect More than One Line From Deletion PublicationSinc-LinkPub DetailsSinc-Link v4 n1Volume: 4 Issue: 1DateJanuary/February 1986Pages7Read the articleSee all articles from Sinc-Link v4 n1 Short technique to protect ZX81/TS 1000 programs. TagsSinc-Link TS 1000