Lippincott,

Four Winds Press,

Four Winds Press,

Random House Australia,

U.S. Dept. of the Interior, U.S. Geological Survey ; U.S. Geological Survey, Earth Science Information Center, Open-File Reports Section [distributor],

Pocket books,

Farrar, Straus/Giroux,

Harcourt Brace Jovanovich,

Scholastic Press,

Medical Library Association ; Neal-Schuman Publishers,

University of Minnesota, the College of Education and Human Development ; U.S. Dept. of Education, Office of Educational Research and Improvement, Educational Resources Information Center,

Paramount,