TY  - BOOK
TI  - NATURAL RUBBER, SOME ACTIVITIES IN THE FIELD OF DEVELOPMENT. LE CAOUTCHOUC NATUREL, RECHERCHE D'APPLICATIONS NOUV
PY  - 0000///s.d
PB  - THE HAGUE, H.P. SWART & SON LTD. 56pp., 14 Fig.
ER  -