Will be having some extra brochures for plated memory from Memory systems Inc.? in El Segundo Calif. Available soon.? appears? to? be? from month? 4? of? 1973? and? 3? different? ?sheets? both? sides. ? I? know? about? core memory? but this is? something? I never? used.. ? these may be out there already? somewhere? ? ?? ? Ed# ? ?