TY  - BOOK
AU  - Von Helmholtz hermann
TI  - Epistemological writings ed by Robert S Cohen  and Yehuda Elkana tr by Malcolm F Lowe
T2  - Boston stuidiesn in the philosophy of science; 37. Synthesis library; 79
U1  - R2, L3 
PY  - 1977///
CY  - Dordrecht
PB  - Holland D Reidel     
ER  -