Feature

Vitamin D Forms Vary

Sulfa Drugs Could Cause Wrong Military Decisions

Primer Uses Lead Instead of Mercury for Explosive

Cotton Picking Machines Work like Vacuum Cleaner

Bats Caught in Road Oil; Recalls Ice Age Tragedy

Tetryl Causes Illness

[Photograph]: Synthetic Rubber Bags

Russia Far from Out

U. S. Lacks Women Doctors; Blamed on Prejudice

Books Just off the Press

[Photograph]: Mars

Front Matter