TY - RPRT TI - Microbial corrosion : technical summary report number 1 for the period May 1, 1967 to April 30, 1968 AU - Iverson, Warren P PY - 1968 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 9846 DO - 10.6028/NBS.RPT.9846 ER -