General Nature in 1990

Science in Action by Lenihan

Ecological Relationships of Plants and Animals by Howe, Henry F., Westley, Lynn C.

The Valuation and Investment Merits of Diamonds by Khoury, Sarkis

The Works of Charles Darwin: Subset by Darwin, Charles

Mac's Field Guides: Northeast Coastal Fish by Macgowan, Craig

Secret Worlds of Colin Fletcher by Fletcher, Colin

National Audubon Society Pocket Guide: Familiar Mushrooms by National Audubon Society

National Audubon Society Pocket Guide: Familiar Butterflies of North America by National Audubon Society

Langston Hughes by Mikolyzk, Thomas

Mac's Field Guides: Northeast Park & Backyard Birds by Macgowan, Craig

Mammals of the Pacific States: California, Oregon, Washington by Ingles, Lloyd G.

Die Mineralien Der Schweiz: Ein Mineralogische Führer by Weibel, Max

Identifying Wood: Accurate Results with Simple Tools by Hoadley, R. Bruce, Hoadley Estate of, Barbara L.

Natural History of the Antarctic Peninsula by Moss, Sanford

Giving Birth to Thunder, Sleeping with His Daughter by Lopez, Barry H.

Contamination of Groundwater: Prevention, Assessment, Restoration by Barcelona, Michael W.