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Proceedings of the Fourth congress of the International society of sugar cane technologists held at San Juan, Puerto Rico, March 1st-16th 1932
- 877.15
- Bureau of supplies, printing, and transportation,
- 1933.
- San Juan :
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An economic entomology of the West Indies / by George N. Wolcott.
- Entomological society of Puerto Rico,
- 1933.
- San Juan :