31. Professor Roald Hoffmann lectures to one of his chemistry classes Collection: Images from the Rare Book and Manuscript Collections Date: 1990 Format: Image Creator: Hildreth, Chris (American photographer)
32. Volume 72, Number 1: American journal of agricultural economics Collection: Core Historical Literature of Agriculture Publisher: American Agricultural Economics Association Publication Place: Menasha, Wis. Date: 1990 Format: Issue
33. Volume 72, Number 2: American journal of agricultural economics Collection: Core Historical Literature of Agriculture Publisher: American Agricultural Economics Association Publication Place: Menasha, Wis. Date: 1990 Format: Issue
34. Volume 72, Number 3: American journal of agricultural economics Collection: Core Historical Literature of Agriculture Publisher: American Agricultural Economics Association Publication Place: Menasha, Wis. Date: 1990 Format: Issue
35. Volume 72, Number 4: American journal of agricultural economics Collection: Core Historical Literature of Agriculture Publisher: American Agricultural Economics Association Publication Place: Menasha, Wis. Date: 1990 Format: Issue
36. Volume 72, Number 5: American journal of agricultural economics Collection: Core Historical Literature of Agriculture Publisher: American Agricultural Economics Association Publication Place: Menasha, Wis. Date: 1990 Format: Issue
37. Volume 39, Number 1: Arkansas farm research Collection: Core Historical Literature of Agriculture Publisher: Agricultural Experiment Station, University of Arkansas Publication Place: Fayetteville, Ark. Date: 1990 Format: Issue
38. Volume 39, Number 2: Arkansas farm research Collection: Core Historical Literature of Agriculture Publisher: Agricultural Experiment Station, University of Arkansas Publication Place: Fayetteville, Ark. Date: 1990 Format: Issue
39. Volume 39, Number 3: Arkansas farm research Collection: Core Historical Literature of Agriculture Publisher: Agricultural Experiment Station, University of Arkansas Publication Place: Fayetteville, Ark. Date: 1990 Format: Issue
40. Volume 39, Number 4: Arkansas farm research Collection: Core Historical Literature of Agriculture Publisher: Agricultural Experiment Station, University of Arkansas Publication Place: Fayetteville, Ark. Date: 1990 Format: Issue