Nicholas Collin's Appeal to American scientists.
Bell
W J
WJ
D047788:American Revolution; D018556:Crops, Agricultural / Q000191:economics / Q000266:history; D003466:Cultural Characteristics; D004467:Economics / Q000266:history; D006666:History of Medicine; D049671:History, 18th Century; D008373:Manuscripts as Topic / Q000266:history; D019021:Natural History / Q000193:education / Q000266:history; D019370:Observation; D015143:Philadelphia / Q000208:ethnology; D010820:Physicians / Q000191:economics / Q000266:history / Q000523:psychology; D012108:Research Personnel / Q000191:economics / Q000193:education / Q000266:history / Q000523:psychology; D012586:Science / Q000191:economics / Q000193:education / Q000266:history; D012922:Social Change / Q000266:history