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5821
A follow-up study of summer institutes for biology teachers in 1969 and 1970 [microform]
Published 1974Visual Material -
5822
Study on the Algal epiphytes of exposed and protected marine waters of Batangas [microform]
Published 1974Visual Material -
5823
Embryogenesis in Amaranthus Spinosus Linn. and Amaranthus Viridis Linn. [microform]
Published 1974Visual Material -
5824
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5825
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5826
An evaluative survey of biology teaching in the secondary schools of Cagayan province, school year 1969-1970 [microform]
Published 1974Visual Material -
5827
A study of the factors affecting the flight rhythm of drone honey bees Apis Mellifera L. [microform]
Published 1974Visual Material -
5828
The littoral echinoderm fauna of Marinduque between Boas and Santa Cruz [microform]
Published 1974Visual Material -
5829
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5830