TY  - GEN
AU  - Byrne, John
AU  - Heller, Robert
AU  - Kaufmanis, Karlis
AU  - Ojahangas, Richard
AU  - Renuad, Jane Woolen
TI  - Earth science
T2  - Challenges to science
U1  - 550 HEL 
CY  - Webster division,Mc Graw-Hill Book Co
KW  - Earth science/astronomy/atmosphere
ER  -