TY  - BOOK
AU  - Boltyanskii,V.G.
AU  - Brown,Robert B.
AU  - Putham,Alfred L
AU  - Irszup,Izaak
ED  - University of Chicago.
TI  - Envelopes
U1  - 510 
PY  - 1964///
CY  - Oxford
PB  - Pergamon Press
KW  - Envelopes (Geometry)
KW  - Mathematics
KW  - Geometry
N1  - Survey of Recent east European mathematical literature ; a project conducted by Alfred L. Putham and Izaak Irszup ; The University of Chicago
ER  -