TY  - SER
TI  - Dissertation abstracts international. B. The Sciences and engineering
SN  - 0419-4217
AV  - Z5055 
U1  - 011.7 
CY  - Ann Arbor, Mi.
PB  - UMI
N1  - Editorial varia: jul. 1969- ago. 1972 University Microfilms; sep. 1972-may. 1976, Xerox University Microfilms; jun. 1976- University Microfilms International
ER  -