Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 2-6

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 13-19

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 20-24

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 24-26

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 26-28

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 103-109

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 110-113

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 114-120

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 120-123

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 175-184

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 189-193

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 194-196

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 205

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 239-246

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Published in Journal of The Washington Academy of Sciences, in 1971, in volume 61, pages 266-271

Created: 2014-01-30, modified: 2014-01-30