TY  - BOOK
AU  - Laszlo,Ervin
TI  - The relevance of general systems theory: Papers presented to ludwing von bertalanffy on his seventieth birthday 
T2  - The International library of systems theory and philosophy
SN  - 0807606588
AV  - Q295 L36
PY  - 1972///
CY  - New York
PB  - G. braziller
KW  - Bertalanffy, Ludwig von,
KW  - Sistema, Teoria de los
KW  - Discursos, ensayos, conferencias
ER  -