the three main transmissions. in {snga 'gyur snying ma} 1) {ring brgyud bka' ma}. 2) {nye brgyud gter ma} 3) {zab mo dag snang} Kongtrül. 1) {rgya che ba bka' ma}. 2) {zab mo gter ma} 3) {nye brgyud dag snang} in {snga 'gyur snying ma, bka' ma, gter ma, dag snang}