TY - RPRT TI - Circular of the Bureau of Standards no. 587: electroforming of waveguide components for the millimeter-wavelength range AU - Feldmann, Albert A PY - 1957 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 587 DO - 10.6028/NBS.CIRC.587 ER -