TY  - BOOK
AU  - Lotspeich, William
TI  - Discoveries in science : : how they are made
PY  - 1968///
CY  - New York : 
PB  - Fawcett Publications, 
KW  - CIENCIA
KW  - TEORIA DE LAS CIENCIAS
N1  - This Ladder Edition has been especially prepared for the beginning reader.This edition is for readers for whom English is a second language. It can be anyone whos has learned 2,000 words of english
ER  -