TY - RPRT TI - Evaluation program for secondary spacecraft cells. Evaluation of storage methods, open circuit versus continuous trickle charge, sonotone 3.5 ampere-hour sealed nickel- cadmium secondary spacecraft cells AU - Thomas, R. E. PY - 1969 UR - https://ntrs.nasa.gov/citations/19710003951 ID - 19710003951 ER -