AN 08-10-112.pdf  Maintenance manual for BC-348-J, N, Q.  rev. 17 July 1943.
AN 08-10-209.pdf  Maintenance manual for BC-348-E, M, O, P, S, BC-224-E, G, H, L.  rev. 1 March 1944
TO 08-10-119.pdf  Operation and Maintenance manual for BC-348-E, M, P.  15 December 1942.
TO 12R2-3BC-112.pdf  Maintenance manual for BC-224-F, K, BC-348-H, K, L, R. rev. 11 February 1955.
These files originally scanned and made available with the compliments of Phil Mills, W5BVB.

AN 12R2-3BC348-2.pdf  Maintenance manual for BC-348-J, N, Q.  rev. 21 June 1948.
These files are made available with the compliments of August Johnson, KG7BZ.