2 ms·
The card index system; its principles, uses, operation, and component parts https://archive.org/details/cardindexsystemi00bylerich https://archive.org/details/
by kd5bjo 8y ago
The card index system; its principles, uses, operation, and component parts
https://archive.org/details/cardindexsystemi00bylerich https://archive.org/details/cardindexsystemi00bylerich