TY  - RPRT
TI  - Natural And Artificial Ecosystems
AU  - Macelroy, Robert D.
AU  - Thompson, Brad G.
AU  - Tibbitts, Theodore W.
AU  - Volk, Tyler
PY  - 1994
UR  - https://ntrs.nasa.gov/citations/19940000236
ID  - 19940000236
ER  -