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 - Christy, D. E. PY - 1969 UR - https://ntrs.nasa.gov/citations/19690028893 ID - 19690028893 ER -